This is the book ______we are looking for. 
#35794
A
who
B
which
C
whose
D
Whom
推荐题目
His father _____________ for nearly a month.
#35643
A
left
B
away
C
has left
D
has been away
Math is boring and       difficult.
#35947
A
of
B
too
C
any
D
some
---        will your mother come back?   --- In two days.
#35842
A
How often
B
How long
C
How soon
D
How far
French is _______ difficult to learn.
#35679
A
kind of
B
a bit of
C
a lot of
D
kinds of