| 根据句意和提示完成句子。 |
| 1. Has it reached ______ (火星) yet? 2. The journey has taken ______ (数月). 3. We haven't found life on other______ (行星) yet. 4. The sun and its planet are called ______ (太阳系). 5. It's an ______ (不载人的) mission. 6. The______ (宇航员) have discovered many interesting things ______. 7. The m______ (信息) has been around the country about three years. |
| 用适当的短语完成句子。 hear about, millions of, try doing sth. go around, more than, send sb.(a) message(s), try to do sth. 1. I haven't seen Tom for a long time, so I ______ him ______ . 2. The earth is a planet and it ______ ______ the sun. 3. There has been life on earth for ______ years. 4. There is ______ one galaxy. 5. They have ______ send information to us. 6. —Tom, I've just heard that scientists have sent a spacecraft to Mars. —Really?I haven't ______ this yet. |
| 选出适当的句子补全对话。 |
| Jack: 1.______ Lucy: I have been to the bookstore.Look,I bought a book. Jack: What is its name? Lucy: "Journey to Mars". 2.______ Jack: No, I hav  en't read it before.Do you mind lending it to me?Lucy: 3.______ Jack: Thank you! Lucy: 4.______ A.Of course not. Here you are. B. Have you read this book befo  re?C. Not at all. D. Where have you been? |
| Both his parents look sad. Maybe they what's happened to him. |
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| A. knew B. have known C. must know D. will know |
—These farmers have b een to the United States.—Really?When there? |
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A. will they go  B. did they go C. do they go D. have they gone |
| — you your homework yet? —Yes. I it a moment ago. |
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| A. Did; do; finished B. Have; done; finished C. Have; done; have finished D. will; do; finish |
| Miss Green isn't in the office. She to the library. |
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| A. has gone B. went C. will go D. has been |
| My parents Shandong for ten years. |
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| A. have been in B. have been to C. have gone to D. have been |
| It ten years since he left the army. |
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| A. is B. has C. will D. was |
| 根据括号中的要求改写下列句子。 1. He is going to Shanghai. (用现在完成时) ______________________________________ 2. I heard about the news about the space travel. (改为同义句) ______________________________________ 3. Scientists have found life on other planets.(改为否定句) ______________________________________ 4. They haven't been to Mars. (用yet) ______________________________________ 5. The spacecraft has reached the moon. (用just) ______________________________________ 6. Many astronauts have visited the space stati  on. (用already) ______________________________________ |