【题目】I hate when people talk with their mouths full.
A. it
B. that
C. these
D. them
在线课程【答案】A
【解析】it是形式宾语，真正的宾语是when people talk with their mouths full，因为hate在此处是及物动词，后面必须加宾语，但是when people talk with their mouths full是一个句子，此种情况下，为了避免句子前后结构比例失调，通常用it充当形式宾语。