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A rocket uses fuel to make power for the engine. The fuel is set on fire inside the rocket. As the fuel burns, it creates gases that have great pressure. These gases are blasted out of the rocket engines.
These gases all go out the bottom of the rocket engine where it is open. They come out so fast and with so much power that the rocket is pushed up. It is pushed up so hard that the rocket overcomes the force of gravity, which tries to keep everything on the ground. The force that pushes up against the front of the rocket is called thrust.
Unlike an airplane, a rocket does not use wings to help it fly. It just uses the power and force created by the burning fuel to make enough thrust.
Decide whether the statements are True (T) or False (F).
1. A rocket uses the energy from wind to make power for the engine. ...........F......
2. When the fuel burns, it creates gases that have great pressure. ...........T......
3. These gases come so fast but they have little power. .......F..........
4. The rocket is pushed up because it overcome the force of gravity. .......T..........
5. The rocket has two wings which help it fly. ............F.....
1. Sắp xếp lại những câu sau đúng trật tự ngữ pháp:
1.1. A/ to improve/ is watching /your English / American/ TV series/ good way.
→ A good way to improve your English is watching American TV series
1.2. I / in learning /a new/ am/ language/ interested.
→ I am interested in learning a new language.
1.3. I / exams/ hard / without trying/ passed / too/ my.
→ I passed my exams without trying too hard.
1.4. and/ I / move/ house/ decided to/ next year/ My partner/.
→ My partner and I decised to move house next year.
1.5. always/ eating/ We/ very/ late/ finish/.
→ We always finish eating very late.
i buy these pencil-cases in this bookstore
-> These pencil-cases are bought in this bookstore by me.
II. Complete the sentences with the correct form (to-infinitive or -ing form) of the verbs in the box. Some verbs can be followed by either a to-infinitive or an -ing form.
1. My brother loves _____watching________ live football on TV.
2. Do people in your country like _______travelling______ abroad on vacation?
3. Riding a bike is Lan’s pleasure, but she detests _______cycling______ in the rain.
4. I don’t mind _______staying______ at home to look after the children.
5. As a child, he hated ______reading_______ books, but now he finds it enjoyable.
6. Minh is in good shape. He enjoys _____doing________ sport and exercise.
7. She doesn’t like _____getting________ up early in the morning, especially at the weekend.
8. Emily dislikes _______making______ crafts, but she enjoys origami.
9. I fancy ______hanging_______ out tonight because I’m too tired to cook.
10. Nancy adores ______eating_______ with her best friend Helen.
23 , Has / knocked
24 , Have / left
25 , Has - seen / has - seen
26 , Have / been
27 , have read
28 , has / seen
29 , have / eaten
30 , has / catted
31 , have / seen
32 , .......
33 , has / studied
34 , have / studied
35 , have / known / have known
36 , Have / been / have been
37 , haven't seen
23. Has- knocked
24. Have - left
25. Has - seen / has - seen
26. Have - been
27. have read
28.has - seen
29. have - eaten
30. has - eaten
31. have - seen
32. has killed
33. has - lived
34. have - studied
35. have - known / have known
36. have - been / have been
37. haven't seen
-HT-