单项选择题

It's reported that by the end of the month the output of cement in the factory ______ about 10%.

A. will have risen
B. has risen
C. will be rising
D. has been rising

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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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