What _____________ they doing?[ ]A. amB. isC. areD. be-四年级英语

题目简介

What _____________ they doing?[ ]A. amB. isC. areD. be-四年级英语

题目详情

What _____________ they doing?
[     ]
A. am
B. is
C. are
D. be
题型:单选题难度:偏易来源:同步题

答案

C

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