四六级考试

试题来源：大学四级-231
【单选题】 The doctor's practice has ______ because of his carelessness.
A．dropped by
B．dropped in
C．dropped off
D．dropped out

参考答案：C
网考网解析：
由于粗心大意，这位医生的病人愈来愈少了。短语drop by意为“顺便访问”；drop in“偶然访问”；drop off“睡着... 查看试题解析出处>>