He is working hard, ______will make him pass the final exam. 
#73845
A
that
B
which
C
for which
D
who
推荐题目
 He bought some books, ______ were expensive.
#71965
A
most of which
B
the most of which
C
most  
D
the most of that
The professor said he could talk on _____ interested the audience.
#72060
A
any topic
B
which topic
C
whichever topic
D
the topic he thought it