单项选择题

Don't be 'afraid of asking for help ______ it is needed.

A. unless

B. since
C. although

D. when

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单项选择题

______ new buildings will be built in my hometown.

A．A great deals of

B．A lots of
C．A plenty of

D．A great number of

单项选择题

—I'm going back to see my parents this afternoon. —______.

A．It's very nice of you

B．You'd better hurry
C．Say goodbye to them

D．Give my best wishes to them

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