问题
选择题
I _____ my homework while my parents _____ TV last night. [ ]
A. did; have watched
B. was doing; were watching
C. had done; were watching
D. would do; were watching
答案
答案：B
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I _____ my homework while my parents _____ TV last night. [ ]
A. did; have watched
B. was doing; were watching
C. had done; were watching
D. would do; were watching
答案：B
