Một vật chuyển động trên đường thẳng theo phương trình x = -12 + 2t-t^2 tốc độ trung bình từ thời điểm t1 = 0,75 giây đến t2 = 3 giây bằng A :3,6m/s. B :9,2m/s . C .2,7 m /s . D.1,8 m/ s

Câu1: I'll help you with your homework . A.after I had done my own. B.as soon as I have done my own. C.until I did my own. D.when Iwas doing my own. Cau2: ,leave it in the hospitalfor someone else to read. A.when you have read the book. B.After you had read the book. C.before you are reading the book. D.While you were reading the book. Cau3:the woman over there is my teacher. A.who stand. B.standing. C.stands. D.to stand. Cau4:My hobby is watching the work by Shakespeare in the 20th century. A.writing. B.written. C.to write. D.is writen. Cau5:he will take the dog out for a walk dinner. A.before he had finished. B.until he finished. C.as soon as he finishes. D.when he was finishing. Cau6:we vistied the cinema by a Spanish Architect in the 18th century. A.designed. B.which disigned. C.was designed. D.designing. Cau7:by the time you come here tomorrow ,the work . A.will have been finishing. B.will be finishing. C.will have been finished. D.will be finished. Cau8:I live in a pleasant room a big vegetable garden. A.to overlook. B.overlooked. C.which overlooking. D.overlooking. Cau9:I will tell him to call you . A.as soon as he teturned. B.until I saw him. C.when he returns. D.after Id seen him. Cau10:success will certainly come to anyone . A.on condition that he will work hard B.as long as he work hard. C.supposing he worked hard. D.unless he dose not work hard. Cau11: remains mysterious to the public . A.that the actor committed suicide. B.what the actor committed suicide. C.why the actor committed suicode. D.whether the actor committed suicide. Cau12: ,he will get ready to go to work. A.when he will have breakfast tomorrow. B.until he would have breakfast tomorrow C.After he has breakfast tomorrow. D.As soon as he had breakfast tomorrow . Cau13: affect a persons body has long been known by doctors. A.as emotional disturbances. B.Emotional disturbances. C.that emotional disturbances. D.the only one who has. Cau14:It was from the shop she bought that present for him. A.where. B. Which. C.in which. D.that . Cau15:when uncovered,the balcony chairs will be ruined in this weather . A.left. B.been left. C.leaving. D.having left. Cau16: ,we had already finished work. A.by the time he arrived. B.after he have arrived. C.as soon as he arrives. D.when he had arrived..

Mng giúp em vs ạ (em đang cần gấp ạ em cảm ơn mng nhìu ạ) Choose the best answers. Câu1:Tina would consider to finland with us this summer . A.going. B.to go. C.to going. D.you'll go. Cau2:Cals suggested to going to the gym for a good workout. A .to ho. B.going. C.to have gone. D.having hone. Cau3:we will get a designer up our old house soon. A.do. B.to do. C.doing. D.done. Cau4:It's not easy for a job at your age. A.starting looking. B.to start looking. C.starting to look. D.start to look. Cau5:english seems easier but I janpanese. A.Had rather study. B.would study. C.would rather study. D.rather study. Cau6:he Failed the gold medal in the competition A.to winning. B.win. C.and won. D.to win. Cau7:he prefers watching documentary films to the news on the radio. A.than listening. B.to listening. C.to listen. D.than to listen. Cau8:It's strange that you such a thing. A.would say. B.should say. C.will say. D. Said. Cau9:I couldn't decie what to eat.there was nothing the menu that I liked. A.in. B.on. C.at. D.within. Cau10:they decorated the wedding car ribbons and flowers. A.with. B .to. C.for. D.at. Cau11:A working party has been set up to look the prolem. A.for. B.over. C.round. D.into. Cau12: the furnitune was that I couldn't buy it. A.too expensive. B.very expensive. C.so expensive. D.such expensive. Cau13:why come in and take a seat? A.you not. B.don't you. C.haven't you. D.aren't you. Cau14: of the students in ours class could slove this math prolem. A.neither. B.none. C.not much. D.not. Cau15:I wish the children making so much noise. A.were stopped. B.had stop. C.stop. D.would stop. Cau16:when to the party,she politely refused. A.inviting. B.to invite. C.to be invited. D.invited.

Choose the best answers. Câu1:Tina would consider to finland with us this summer . A.going. B.to go. C.to going. D.you'll go. Cau2:Cals suggested to going to the gym for a good workout. A .to ho. B.going. C.to have gone. D.having hone. Cau3:we will get a designer up our old house soon. A.do. B.to do. C.doing. D.done. Cau4:It's not easy for a job at your age. A.starting looking. B.to start looking. C.starting to look. D.start to look. Cau5:english seems easier but I janpanese. A.Had rather study. B.would study. C.would rather study. D.rather study. Cau6:he Failed the gold medal in the competition A.to winning. B.win. C.and won. D.to win. Cau7:he prefers watching documentary films to the news on the radio. A.than listening. B.to listening. C.to listen. D.than to listen. Cau8:It's strange that you such a thing. A.would say. B.should say. C.will say. D. Said. Cau9:I couldn't decie what to eat.there was nothing the menu that I liked. A.in. B.on. C.at. D.within. Cau10:they decorated the wedding car ribbons and flowers. A.with. B .to. C.for. D.at. Cau11:A working party has been set up to look the prolem. A.for. B.over. C.round. D.into. Cau12: the furnitune was that I couldn't buy it. A.too expensive. B.very expensive. C.so expensive. D.such expensive. Cau13:why come in and take a seat? A.you not. B.don't you. C.haven't you. D.aren't you. Cau14: of the students in ours class could slove this math prolem. A.neither. B.none. C.not much. D.not. Cau15:I wish the children making so much noise. A.were stopped. B.had stop. C.stop. D.would stop. Cau16:when to the party,she politely refused. A.inviting. B.to invite. C.to be invited. D.invited.