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用括号里的词的适当形式填空。 1. I _________(not write) a book before.

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用括号里的词的适当形式填空。
1. I _________(not write) a book before.
2. Our English teacher________( teach ) us for four years.
3. Tony,________ you__________ (finish) your homework yet?
4. He___________(come) back two years ago.
5. He__________ (knock) on the door when I________(read) in my room.
用括号里的词的适当形式填空。 1. I _________(not write) a book before.
1. haven’t written   2. has taught   3.have finished   4. came 5. knocked was reading