Một  tấm kính hình thoi có tổng độ dài hai  đường chéo là  7/6 dm, đường chéo thứ  nhất dài hơn đường chéo thứ hai  dài bằng  2/3 dm đường chéo thứ  nhất  . Hỏi diện tích tấm kính đó bằng bao nhiêu?  

I. Read the following passage and decide if it is T or F.

Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations.

The most effective thing is that we should use natural resources as economical as possible.

V . complete the sentences with the correcter form of the words in brackets

1 I love the ..............................of folk songs                                                                     PERFORM

2 We held the Mid-Autumn festival in..........................house                                           CULTURE

3 The thanks giving is a ..........................festival                                                              SEASON

4 He had an accident last week because he drove...................                                       CAREFUL

1 performances                      2 cultural                          3 seasonal                                 4 carelessly