单项选择题
A.surveying
B.to survey
C.studying
D.to study
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单项选择题
A.muchB.moreC.lessD.fewer
A.much
B.more
C.less
D.fewer
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单项选择题
A.cameB.wentC.setD.thought
A.came
B.went
C.set
D.thought
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