题目内容
用所给动词的适当形式填空
Judie: I've just 1 (watch) a great event (事件)
about space. Do you know that scientists 2 (discover) water on Mars?
Kate: Really? How interesting!3 they 4 (find) life there yet?
Judie: Well,they’re 5 (try) to look for life but they 6 (find) nothing yet.
Kate:And they’ve already 7 (decide) that there's no life on the moon,either.
Judie:That's right. So far,there 8 (be) only life on the earth,isn’t there?
Kate:Yes,I agree. But I think they 9 (go) on 10 (do) a lot of work on other planets.
1. watched 2. have discovered
3. Have 4. found 5. trying
6. have found 7. decided 8. is
9. will go 10. doing
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