单项选择题

By the time he arrives in Beijing, we （） here for two days.

A．have been staying
B．have stayed
C．shall stay
D．will have stayed

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单项选择题
A baby might show fear of an unfamihar adult, he is likely to smile and reach out to another in- fant.（）

A．if
B．whenever
C．so that
D．whereas
单项选择题
I really appreciate （） to help me, but I am sure that I can manage it myself.

A．you to come
B．hat you come
C．your coming
D．how you come
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