The originally clean river is now seriously polluted and unfit _______.
A.to swim
B.for swimming
C.to swim in
D.for swimming in
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She soon ______ to do this regularly.
A.found it possible
B.found possibility
C.found it being possible
D.found possible
下列（）不适用采取冲击钻探方法。（）
A. 黏性土
B. 粉土
C. 砂土
D. 碎石土
Never _____ such a nice chair
A.has he seen
B.he has seen
C.saw he
D.he saw
She preferred that he _____ it in the kitchen.
A. did
B. does
C. should do
D. had done
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