Generally speaking, when _____ according to the directions, the medicine had no

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Generally speaking, when _____ according to the directions, the medicine had no side effect．

A．take

B．taken

C．to take

D．to be taken

答案

解析

略

举一反三

His father was the first on the farm ______ against the slave owner．

A．fought

B．fighting

C．to fight

D．having fought

题型：不详难度：| 查看答案

. The television station reported several times to _________ drivers parking their cars on the blind road.

A．prevent

B．keep

C．forbid

D．protect

题型：不详难度：| 查看答案

—How do you find that Beatles’CD?
—Wonderful. It’s well worth ______.

A．to listen to

B．listening to

C．to be listened to

D．being listened to

题型：不详难度：| 查看答案

．_______from the top of the tower, the north foot of the mountain is a sea of flowers．

A．Seeing

B．Having seen

C．Seen

D．To see

题型：不详难度：| 查看答案

．The problem ________now is very important．

A．being discussed

B．discussed

C．discussing

D．to be discussed

题型：不详难度：| 查看答案