单项选择题

You should have put the milk in the icebox; I expect it （） undrinkable by now.

A. became
B. had become
C. has become
D. becomes

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单项选择题
Whatever the causes, English at the end of the 20th century is more widely spoken and written than any other language （）.

A. ever was
B. had ever been
C. has ever been
D. would ever be
单项选择题
If the whole operation （） beforehand, a great deal of time and money would have been lost.

A. was not planned
B. has not been planned
C. had not been planned
D. were not planned
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