--It’s clever _____ you to help me work out this difficult maths problem. Thanks.--- You are welcome. Now it’s easier ______ you to understand it. 
#47375
A
of; of
B
of; for
C
for; of
D
for; for
推荐题目
The bridge is          the river.
#48055
A
on
B
over
C
in
D
under
There is a big tree ________ the classroom.
#48535
A
in front of
B
at the front
C
in the front of
D
in front