29.【2019 •广西贵港市】—Is Mr Green at school? —Sorry, I don't know. But you can call him

29.【2019 •广西贵港市】—Is Mr Green at school?
   —Sorry, I don't know. But you can call him           340-5261.
   A.in B.With C.by D.at
答案】D
解析】at"在,以,向";in"在……之内";with"用、和……一起";by"通过、被、由",四者都是介词.因call sb at ..."以……给某人打电话".由题干"——格林先生在学校吗?——对不起。我不知道。但你可以给他以340﹣5261打电话。"可知,空格用at,因此答案应是at,故选:D.
 
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