英语,
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英语,英语, 英语,1.was,cleaned2.wasn''ttaking3.wasthegirlwaitingfor4.whatwas,doing5.johnwasshoppingwhil
英语,
英语,
英语,
1.was, cleaned
2.wasn't taking
3.was the girl waiting for
4.what was, doing
5.john was shopping while mark was buying a drink