Listen! Some birds are singing __________ the tree.
#51352
A
in
B
on
C
at
D
of
推荐题目
I think it’s easy ________you _________English well.
#49537
A
for, to study
B
of, to study
C
with, study
D
for, study
It’s hard-working ____ him to spend three hours ____ the library on Sunday.
#47932
A
for; in
B
for; on
C
of; in
D
of; on
