赞题库-背景图
单项选择题

______ you ought to do is to see a doctor.

A．How
B．What
C．Which
D．That
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热门试题

单项选择题He went on to say that it was as important to respect others as ______ by others.

A．to be respected
B．to respect
C．being respected
D．respected

单项选择题______ , that step is not safe!

A．Look around
B．Look up
C．Look out
D．Look down