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( )I sympathize ,I can not really do very much to help them

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( )I sympathize ,I can not really do very much to help them out of the difficulties.A even B while 两个答案都有即使的意思,选哪个?为什么?
I am sure he is up to the job ( )he would give his mind to it.A if only B in case C until D unless 选哪个?
( )I sympathize ,I can not really do very much to help them
第一题选B
因为even不能作为连词,没有连接两个句子的功能,必须用while这个连词.用even句子就有两个谓语了(sympathize和do),这不符合语法
第二题选择A
if only只要
in case万一
until直到
unless除非
这句话意思就是
我可以肯定的是只要他把心思投入到工作,他一定可以胜任这个工作
if only后面引导的是一个虚拟语气的条件从句
be up to是"胜任"之意