is it the email that you received yesterday ______makes you upset?A.which B.what C.that D.when

题目

is it the email that you received yesterday ______makes you upset?A.which B.what C.that D.when
说是强调句.说是去掉it is that,句子说得通就是强调句.可是我就想问了.it is the email which makes you upset.也可以说是定语从句啊,那么选which 如果是 it is the email that you received yesterday.这个句子可以说是强调句吗,强调宾语啊.强调宾语的强调句,去掉it is that 都怪怪的啊.比如说 it　is the place that i went yesterday.也是强调句啊,去掉 it is that 句子不对啊
各种茫然混乱　　求大神!

答案

is it the email (that you received yesterday )that makes you upset?
这句话还原就是 the email (you received yesterday) makes you upset.去掉it is that句子没问题啊.你说的 it is the email which makes you upset.中的WHICH和EMAIL是同位语,which在后半句中做的主语.所以这个句子强调的是主语.IT is只是形式主语.