What did he lost at the railway station (Would you tell me)改为宾语从句

What did he lost at the railway station (Would you tell me)改为宾语从句 what did you do lost saturdau是什么意思? What did he say? What music did he what did he major---------- at university A.in B.at C.about D.on为什么 请问这句话的句子结构,not until his health was lost did he know what it was worth 英语：Sam:what did Jack look so depressed ,JohnSam:what did Jack look like when he lost wallet?John:He looked really worried.前面一句能否改为：how did Jack look when . Could you tell me ___ at the party A what does he say B what he says Cwhat he said D what did he sa what did he said改错 What did he do yesterday? What time did he ___home?A;get to B;arrive at C;get D;arrive in Can you tell me what did he say at the meeting?哪里错的 what did he _______me at the meeting?A say Btalk C tell What did he ____ you to___ at the meeting?ask talktell speak ask speak tell say He is angry ___ what Tom did in his class now 是填at 还是 with what did he lose at the railway station?(would you tell me)间接引语 He did his homework at home last night.变一般疑问句：Did he do his homework at home last night?对at home提问：where did he do homework last night?对last night提问：When did he do homework at home?对did his homework提问：What did he she ws surprised at what he said.为什么what he said,不是what did he say啊主句有助/情态动词,从句可省?