用括号中所给词的适当形式填空。1. I haven"t decided what ________ (write) about. 2. I often hear

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用括号中所给词的适当形式填空。1. I haven"t decided what ________ (write) about.
2. I often hear him________ (sing) in the next room.
3. I find it easy _______ (work) out the difficult problem.
4. It is too dark to see the blackboard________ (clear). you had better turn on the light.
5. — Where is Bob?do you know? — Oh, he                (go) to the post office.
6. The teacher is ________ (please) with what we have done in class.
7. Tom ran so ________ (quick) that I couldn"t catch up with him.

答案

1. to write  2. sing  3. to work  4. clearly  5. has gone  6. pleased  7. quickly