单项选择题

George wasn't in class today. Professor Brown excused him ______.

A．from attending
B．of attending
C．to attend
D．attending
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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
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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