选择 （ ）someone knocket____the door while I____ my breakfast A.on;had B.at;were harving C.on;am
C.on;am having D.at;was having
人气：137 ℃ 时间：2020-03-28 11:58:25
解答
D
敲门 know at the door 固定搭配
所以AC不对
主语I,单数,所以用was having
当有人敲门时,我正吃早饭.
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