解放军文职考试：强调句经典例题

It was during 533-544 ________ Jia Si Xie wrote a book called Qi Min Yao Shu.

A.when
B.which
C.that
D.不填

答案 :
C
It was after he had made an investigation ________ he came to know the truth.

A.where
B.when
C.that
D.and

答案 :
C