Someone
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问题详情:
Someone ______ at the door. Can you open it?
A. knocks B. knocked C. is knocking D. was knocking
【回答】
C
知识点:动词时态
题型:选择题
问题详情:
Someone ______ at the door. Can you open it?
A. knocks B. knocked C. is knocking D. was knocking
【回答】
C
知识点:动词时态
题型:选择题