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12. He ___ articles for our wall-newspaper these three years, and he ____ about forty articles.
A. has been writing; has written
B. has been writing; wrote
C. is writing; has been writing
D. has written; has written
13. She ______ to the office than she got down to writing the report.
A. has no sooner got B. had hardly got
C. no sooner got D. had no sooner got
14. When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.
A. was coming B. had come
C. comes D. would come
15. --- Don’t forget to bring my new books tomorrow afternoon.
--- No, I ______.
A. don’t B. do C. won’t D. will
16. I decided to go to the library as soon as I ______.
A. finished what I was doing
B. finished what I did
C. would finish what I was doing
D. finish what I did
17. You won’t know whether the coat fits you until you ______ it on.
A. will try B. have tried
C. tried D. are trying
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