- Can he arrive on time? - . But I’m not sure. A. He must be

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- Can he arrive on time? - . But I’m not sure. A. He must be B. Maybe he can C. He may can D. He
- Can he arrive on time? - . But I’m not sure.
A. He must be B. Maybe he can C. He may can D. He may be
说明理由

选B.根据他后面说,但我不确定,说明前面的回答是不确定的推测,A表示最肯定的推测,排除.而C,一个句子中出现2个情态动词,错误.D,问的是他是否能到达,不应该用be动词.

- Can he arrive on time? - . But I’m not sure. A. He must be He be married,but I'm not sure. The light is on in his room ,I'm sure he ___back A.must be B He ( ) a little late,but I'm not sure . He seem _____ there at 5:30 p.m,but I'm not sure.A,to be B,w I am not sure what time he will填：get to arrive at arrive rea But he usually ( )(arrive) on time M---- he will come,but I'm not sure.A--- her grandmother is I'm not sure he can swim 改为否定句 He will come .I‘m not sure.A.may B.maybe C.may be D.possible 用must或can't改变I'm sure that he is a middle school theaher 这个句 He is young,____,but experienced A,for sure B.to be sure C.m