The temperature ________ so rapidly,we couldn’t go on with the experiment.[ ]A.fallsB.fellC.fallingD

题目简介

The temperature ________ so rapidly,we couldn’t go on with the experiment.[ ]A.fallsB.fellC.fallingD

题目详情

The temperature ________ so rapidly,we couldn’t go on with the experiment.
[     ]
A.falls  
B.fell
C.falling  
D.fallen
题型:单选题难度:中档来源:同步题

答案

C

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