Mom, I'm afraid it's going to rain. The clouds in the sky are __________. [ ]A. building u

题目简介

Mom, I'm afraid it's going to rain. The clouds in the sky are __________. [ ]A. building u

题目详情

Mom, I'm afraid it's going to rain. The clouds in the sky are __________.
[     ]
A. building up  
B. breaking up
C. staying up  
D. getting up
题型:单选题难度:中档来源:同步题

答案

A

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