It is because English is very useful_____

来源：百度知道 编辑：UC知道 时间：2024/05/26 21:46:36
A.at which we work hard B.that we work hard at it
C.which we work hard at D.wjich we work hard

B 吧.. 这个句子是强调句啊！！It is because English is very useful that we work hard at it.

[强调句：It is/ was + 被强调部分（通常是主语、宾语或状语）+ that/ who（当强调主语且主语指人）+ 其它部分。]

强调句还有个鲜明的特点，就是把结构 It is/ was 和taht/who去掉后，句子仍成立。看看这句子，把结构去掉后变成：We work hard at it because English is very useful。很显然句子成立！！

a

B It在这里是形式主语，而that引导的从句才是真正的主语。这句话如果直译的话应该是这样的：我们刻苦学习英语是因为英语很难。

B