用 discover/find/find out/look for 的适当形式填空。
① I'm my pen.
② He can't his watch anywhere.
③ I it difficult to learn English well.
④ Please the answer to the question.
⑤ Scientists around the world are working to a cure for AIDS.
科目:初中英语 来源: 题型:
[对点训练]用since/for填空。
① She's been working in a bank 1990.
② He's learned about 5 ,000 English words he went to college.③ We have known each other twenty years.
④ I haven’t seen her a long time.
⑤ We have lived here ten years ago.
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科目:初中英语 来源: 题型:
4. 科学家认为地球上的生命已经有亿万年了。
Scientists think that life on the earth for hundreds of millions of years.
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