正确形式填空1.the bus ____(go),it left half an hour ago.2.tody you

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正确形式填空1.the bus ____(go),it left half an hour ago.2.tody you can buy ____ (hundred) of icr cream 3.scientists_____(discover) already that people,can study while they are sleeping 4.the great author ____(writer)many popular books already

went hundreds has discovered has writered 再答： 4应该是：has written
再问： 3那里为什么不是have而是has
再答：看错了，应该是have

正确形式填空1.the bus ____(go),it left half an hour ago.2.tody you you have missed the train ,it ____(leave)half an hour ago -___ you ____ the next yet?-Yes,I ___ it half an hour ago. millie left the school half an hour ago millie____ ____ ____ it usually______her half an hour to go home by bus. 2.乘公共汽车通常要花半个小时The bus ____ usually ____ half an hour. when ()it ()?(arrive) half an hour ago 1.(the bus goes to the airport)和(it runs every half an hour) The film was on half an hour ago.同义句.The film ____ ____ ____ 1.The film began half an hour ago. 用英语解释句子Mr Green left the office half an hour ago This exerci The bus arrived here half an hour ago.改为同义句