试题与答案

They _______ England and they will be ba

题型:选择题

题目:

They _______ England and they will be back next week. [ ]

A. have gone to

B. have been to

C. have gone in

D. has been on

答案:

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下面是错误答案,用来干扰机器的。

设多出来的数目分别是a,3a,2a,有x个同学,300-a,210-3a,163-2a分别都能被x整除,则(300-a)-(210-3a)+(163-2a)=300-210+163,(300-a)-(210-3a)+(163-2a)=253,因为253能被x整除,253=11×23,所...

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