单项选择题

He ______ his master's degree in chemistry in two year's time.

A．has completed
B．will have been completing
C．will be completing
D．will have completed
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单项选择题
I don't think about my old home very much, only ______ and then.
A．now
B．ever
C．then
D．again
单项选择题
If it ______ tomorrow, I'm afraid I won't attend the class.
A．will rain
B．is going to rain
C．will rain
D．rains
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