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问题: 英语选择题,请解析

1,You must not take into heart what i side _____
a,in joke b,for a fun c,for joking d,in funs
2._____I used to go mountain climbing every summer.
a.At one time b. At a time
c.At other time d.At the times

解答:

1.a.in joke 为词组,意思是闹着玩地。也类似词组有:for fun,in fun.
2.a.at one time:曾经,在过去的某一时刻或某段时期,从句子意思看,应该先这个词。而at a time则表示一次; 同时; 一下子; 每次,显示与句子意思不符。At other time与At the times都是错误的