I explained the grammar rule as _________ as I could, but many students are still confused.

A. simple   

B. simplified         

C. simplistic          

D. simply

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best option for each of the blanks. Fill in the appropriate word in question 62

      I was raised on a farm in a remote village in the 1950s. The winter months were endless and everything was covered in snow. I was always (53)________ for the warmer weather to come. When spring arrived, everything came alive- flowers would bloom and the animals would come out of hibernation. I would follow the bear tracks and search for them. Once, however, I (54) ________ an angry mother bear who saw me (55) ________ a threat. (56) ________ the sight of the bear, I did what my father had told me. I stood still until she stopped growling and walked away. The trick was effective, but looking back now, I realized that the situation was (57) ________ more serious than I thought at the time. By the age of twelve, I had lots of camping (58) ________, as I used to go camping with my dog on my school holidays. We would spend days (59) ________ the forest, catching fish for dinner, (60) ________ at the frogs and the (61) ________ of birds and the insects hopping up and down on the surface of the water. Of course, this was possible only during the warm months. When the autumn came, everything went quiet, which was quite usual in those parts. It wasn’t long before the animals disappeared, the birds (62) ________ south and the snow took over. The place became deserted once again.

A. fly

B. flying

C. flew

D. flight

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best option for each of the blanks. Fill in the appropriate word in question 60

      I was raised on a farm in a remote village in the 1950s. The winter months were endless and everything was covered in snow. I was always (53)________ for the warmer weather to come. When spring arrived, everything came alive- flowers would bloom and the animals would come out of hibernation. I would follow the bear tracks and search for them. Once, however, I (54) ________ an angry mother bear who saw me (55) ________ a threat. (56) ________ the sight of the bear, I did what my father had told me. I stood still until she stopped growling and walked away. The trick was effective, but looking back now, I realized that the situation was (57) ________ more serious than I thought at the time. By the age of twelve, I had lots of camping (58) ________, as I used to go camping with my dog on my school holidays. We would spend days (59) ________ the forest, catching fish for dinner, (60) ________ at the frogs and the (61) ________ of birds and the insects hopping up and down on the surface of the water. Of course, this was possible only during the warm months. When the autumn came, everything went quiet, which was quite usual in those parts. It wasn’t long before the animals disappeared, the birds (62) ________ south and the snow took over. The place became deserted once again.

A. watching

B. looking

C. noticing

D. observing

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best option for each of the blanks. Fill in the appropriate word in question 56

      I was raised on a farm in a remote village in the 1950s. The winter months were endless and everything was covered in snow. I was always (53)________ for the warmer weather to come. When spring arrived, everything came alive- flowers would bloom and the animals would come out of hibernation. I would follow the bear tracks and search for them. Once, however, I (54) ________ an angry mother bear who saw me (55) ________ a threat. (56) ________ the sight of the bear, I did what my father had told me. I stood still until she stopped growling and walked away. The trick was effective, but looking back now, I realized that the situation was (57) ________ more serious than I thought at the time. By the age of twelve, I had lots of camping (58) ________, as I used to go camping with my dog on my school holidays. We would spend days (59) ________ the forest, catching fish for dinner, (60) ________ at the frogs and the (61) ________ of birds and the insects hopping up and down on the surface of the water. Of course, this was possible only during the warm months. When the autumn came, everything went quiet, which was quite usual in those parts. It wasn’t long before the animals disappeared, the birds (62) ________ south and the snow took over. The place became deserted once again.

A. By

B. At

C. On

D. In

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best option for each of the blanks. Fill in the appropriate word in question 53

      I was raised on a farm in a remote village in the 1950s. The winter months were endless and everything was covered in snow. I was always (53)________ for the warmer weather to come. When spring arrived, everything came alive- flowers would bloom and the animals would come out of hibernation. I would follow the bear tracks and search for them. Once, however, I (54) ________ an angry mother bear who saw me (55) ________ a threat. (56) ________ the sight of the bear, I did what my father had told me. I stood still until she stopped growling and walked away. The trick was effective, but looking back now, I realized that the situation was (57) ________ more serious than I thought at the time. By the age of twelve, I had lots of camping (58) ________, as I used to go camping with my dog on my school holidays. We would spend days (59) ________ the forest, catching fish for dinner, (60) ________ at the frogs and the (61) ________ of birds and the insects hopping up and down on the surface of the water. Of course, this was possible only during the warm months. When the autumn came, everything went quiet, which was quite usual in those parts. It wasn’t long before the animals disappeared, the birds (62) ________ south and the snow took over. The place became deserted once again.

A. investigating

B. detecting 

C. researching

D. exploring

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

        The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been "primed" by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.
        Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.
In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective. Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

What does this passage mainly discuss?

A. Good nutrition          

B. Food with fiber

C. Ways to keep your teeth healthy  

D. Fluoridization and cavities