It is widely believed that the pull of gravity on a falling raindrop changes ______ round shape into a teardrop shape.

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问题 It is widely believed that the pull of gravity on a falling raindrop changes ______ round shape into a teardrop shape.

选项 A、of the drop
B、the drop’s
C、drop of
D、drops their

答案B

解析 句意:人们普遍认为重力作用使降落的雨滴从圆形变成了泪滴形。此句包含由that引导的宾语从句,从句谓语动词changes的宾语不完整,据选项推知需要一个和round shape搭配的表所属关系的词组,B恰好构成所有格形式。若选A,语序应为the round shape of the drop;C所属关系颠倒;D结构混乱。
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