He's doing his homework which he _____ last nightA.ought to doB.must have doneC.could be doneD.should have done选那个？为什么？

what's he doing?he's w------ his car .填字母 ---- what's he doing for vacation?---- he _______(babysit) his brother. where is mike going?---_____.a.he's doing his homeworkb.he's writing a letterc.he's going to the libraryd.he's talking there insist on one’s doing 造个句子 He can nothing change his mind 怎么办翻译 what's David doing?——He is b with his homework.后面加什么? doing,his,with,taking,what's,he,off,coat,is,it连词成句 He is doing his homework 中文 He is doing his homework .翻译 he is()doing his homework速求! He is j___ doing his homework He is b_____ doing his homework he is doing his homework 改复数 The students in our school have ( ) off and spend ( ) time doing their homew A:_Zhang ping doing in his room?B:He's listening_the radio.用适当的单词填空 he is doing something fun he is meeting his friends He is doing his homework.He said改为宾语从句 he said what he was doing his homework是什么句式 He told me that he _____(finish) doing his homework