Look_______ the birds. They are lovely.
#48166
A
at
B
up
C
for
D
on
推荐题目
We should throw the rubbish into the dustbin ______ protect our environment. 
#49489
A
as a result
B
so that
C
in order to
D
in order not to
Mr. Brown buys some pens and notebooks _______.
#48092
A
for we
B
for us
C
to we
D
to us
What are you doing _____ vacation?
#48594
A
for
B
in
C
on
D
at