相关考题
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单项选择题
Such changes can alter the social structure,（）people to move.
A.leading
B.which led
C.leads
D.which leading -
单项选择题
Cycling is a good exercise.（）, it doesn't pollute the air.
A.Therefore
B.However
C.Moreover
D.But -
单项选择题
They were asked to avoid（）any water which had not been boiled.
A.drinking
B.not to be drunk
C.to drink
D.having
