You must have spent hours_____ it up.[ ]A. to clean B. cleaningC. cleanD. cleaned-八年级英语

题目简介

You must have spent hours_____ it up.[ ]A. to clean B. cleaningC. cleanD. cleaned-八年级英语

题目详情

You must have spent hours _____ it up.
[     ]
A. to clean
B. cleaning
C. clean
D. cleaned
题型:单选题难度:中档来源:同步题

答案

B

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