单项选择题

The more acid you add to the solution, （）it becomes.

A. cloudier
B. the cloudiest
C. more cloudy
D. the cloudier

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单项选择题

（）, he would not have recovered so quickly.

A. Hadn’t he been taken good care of
B. Had he not been taken good care of
C. Had not he been taken good care of
D. Had he been not taken good care of

单项选择题

9（）

A.good
B.fine
C.edible
D.delicious