【单选题】
Columbus discovered America but did not ___ the new continent.
A. seek
B. investigate
C. search
D. explore
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答案
D
解析
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A. just have had
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A. weight
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【单选题】
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A. sufficient
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【单选题】
Surgeons began to ___ their hands and arms with soap and water before operating.
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【单选题】
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【单选题】
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A. mix
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A. go into
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A. destroy
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A. institute
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A. invested
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【单选题】
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A. carve
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