10．I think I had at least a billion tests，including one in which they _________ a piece of muscle from my leg and looked at it under a microscope．（　�。�
A．cut inB．cut downC．cut outD．cut up

分析 我覺得我至少做了10億的測試，其中包括他們從我的腿切下一塊肌肉組織在顯微鏡下觀察．

解答 B．考查動詞短語．根據(jù)句意覺得我至少做了10億的測試，其中包括他們從我的腿切下一塊肌肉組織在顯微鏡下觀察；cut down，切下；故選B．

點評 考查動詞短語；cut down，切下；cut out 切除；首先通讀整個句子，了解句子大意和句子結構，在根據(jù)選項作出正確選擇．

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