If I （ ）when he aomes,please wake me up.A.sleep B.am sleeping C.will sleep D.slept是不是选B?

I haven’t heard from him（ ）he left home.A、when B、since C、as D、if I don't know [ ] this evening.答案为什么选a?a.if he will be freeb.whether he is freec.when he is freed.when is he free _____ we ever meet again I hope he remembers to thank me.A.If and when B.When and where C.If and what D.When and how I want to know _____ he will come tomorrow为什么是 if 而不是 when I asked him ( ) with us.A.when to go B.when he will go C.if he will go D.that he would go Do you remember ( ) he came?Yes,I do.He came by car.A how B when C that D if -----Do you koow ( ) he came?-----Yes,I do.He came by car.A.when B.this C.how D.if If I （ ）when he aomes,please wake me up.A.sleep B.am sleeping C.will sleep D.slept是不是选B? 改错题（下列每句有一个错误的地方,请改正）1.He asked me that if I was a farmer.2.I was told when the meeting begins.3.Did Mike say that was he feeling ill?4.I don't know if the movie star will come or not.5.I wondered what he likes 怎么理解这句话?If I were any better,I would be twins.When someone would ask him how he was doing,he would reply,“If I were any better,I would be twins!”他为什么这样回答? I ____just ____（arrive）when he left . he wanted to know when i （leave）for Shanghai When I called him,he was not in.When I called him,he was not （ ）（ ）同义句转换 if you lost a book,you(have to)pay for itthe ship would have sunk if it (not be)for the capitalthey (should study)but they wasted so much precious timeif i (have)time tomorrow ,i would(aome)to help you I don't know（ ）the day after tomorrow.A when doI don't know（ ）the day after tomorrow.A when does he come B how will he come C if he comes D whether he'll come填ABCD 求助一道英语时态题When chichester arrived in london ,he said I feel as if I ______(Wake） from a nightmare.帮我填下并讲解 连词成句:1.he,help,will,can,help,if,he,you2.the,come,will,I,this,about,here,when,with,manager,talk,him两分钟内要 He failed in the exam,and I wonder ___ he studied hard in the school.A.when B.that C.if D.where