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题目
Did you hear someone__door while you __TV last light Yes,I did,I opened the door but found nobody
outside
Aknocking at was watching
Bknock at were watching
选C,为什么不选A,hear sb do sth 和doing都有啊

提问时间:2020-06-13

答案
you 要用were 啊!
很高兴为你解答!
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