What is this?They are a book哪个词错了

This is what they This is what they 急用! that is what they 'll do in this we asked some people what they think and this is what they said.翻译 what is this和are they triangles 和look at my bag 和 what shape is A:I don;t know .Oh ,look at that boyin puruple .I think it's ____.B:B:excuse me , is this _____ bike?C:No,is isn't.____bike is blue.But I konw Lily's bikes are yellow . D:What class are ___ in?C:They're Class6,Grade7.D;Excuse me, ar 英语单句改错.五句!1.she is the girl with who I went there.2.This is the hero whom are proud.3.the only thing what we can do is to give you some money.4.do you known the things and persons which they are talking about?5.the factory which we ar we asked some people what they think and this is what they said 中什么是宾语从句,什么是表语从句 what are they?They are stationery是对的吗?还是What's this?It is stationery.是对的, This is what they are talking about .为什么要是that is what is this和what is that的回答与区别 what are they和what are these/those的回答与区别.是this is /that is.还是it is /it's是they are these are /those are This is what I what What is this? 翻译what is this what is this? 翻译what is this What is this. 改错 this is what happens.