Class Two ____ taking their lessons when there was a knock at the door. [ ]A. is B. areC. was D. wer

题目简介

Class Two ____ taking their lessons when there was a knock at the door. [ ]A. is B. areC. was D. wer

题目详情

Class Two ____ taking their lessons when there was a knock at the door.
[     ]
A. is
B. are
C. was
D. were
题型:单选题难度:中档来源:专项题

答案

D

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