单项选择题

Surely, there are lots of problems solving in our research so we need to get well prepared in advance.

A．lots of problems
B．solving
C．need to
D．get well prepared
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单项选择题
Skating can be good for you （） correctly.

A．though doing
B．though done
C．if done
D．if doing
单项选择题
Who has eyes can see what great achievements we have made since 1978.
A．Who
B．has eyes
C．what great achievements
D．have made
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