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1.chang A for

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1.chang A for
2.The retired workers were invited to the company,_____(令他们惊讶的是)changes had been so great over the years.
这句话里面可否填 what surprised them were?为什么答案上是 to whose surprise?
3.Can you list the country________(湄公河流经的)(flow through)
1.chang A for B是什么意思? 用A来交换B
2.The retired workers were invited to the company,___To their surprise__(令他们惊讶的是)changes had been so great over the years.(to one's surprise, 是某人吃惊的是.)
这句话里面可否填 what surprised them were? 为什么答案上是 to whose surprise?
3.Can you list the country_that River Mekong flows through______(湄公河流经的)(flow through) (或者 through which River Mekong flows)
再问: 第三个题的答案的确是你这个,但是为什么不能用which the Mekong River flowed through?
再答: 也是可以的,只不过当先行词在从句中作介词宾语时,可以把介词放到关系代词的前面, 如果介词提前就不能用that