21. It's ___ time of year of the corn harvest. That is to say, it's _____ time for us to get in corn.
A. the, the B. the, / C. /, the D. /, /
22. What are you ___ if she asks you to stay?
A. doing B. to do C. to be done D. to be doing
23. Would you please help me to _____ up these new books?
A. wrap B. send C. keep D. post
24. His heart stopped_____just when we reached the hospital.
A. beating B. hitting C. striking D. attacking
25. The manager assured the customer that his complaint would be soon seen _____ .
A. at B. to C. on D. by
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