问题
选择题
What _________ your parent _________ at that time yesterday?[ ]
A. is; doing
B. are; doing
C. was; doing
D. were; doing
答案
答案：C
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What _________ your parent _________ at that time yesterday?[ ]
A. is; doing
B. are; doing
C. was; doing
D. were; doing
答案：C