I think ______ is necessary ______ us to do something useful to protect the birds.
#50276
A
this; for
B
it; of
C
this; of
D
it;for
推荐题目
When Rose walks __________ the toy shop, she often stops to look at the cute teddy bears __________ the window.
#49880
A
pass, across
B
past, across
C
pass, through
D
past, through
