题目内容
( ) 1. Quite a few unknown things in that area last year.
A. were discover
B. will be discovered
C. were discovered
D. was discovered
l.C由last year可推断是一般过去时，又因为unknown things和discover是被动关系，所 以用一般过去时的被动语态。主语是复数。故选c
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