-- What can trees do _________ us ?--- They can _________ harmful gases and produce oxygen .
#58609
A
helping , take in
B
to help , take in
C
helping , take out
D
to help , take care
推荐题目
一It looks 1ike a kind of cat．What do you think?一Yes, I ________ ．
#54227
A
understand
B
know
C
mean
D
agree
It’s very warm here in the room. You’d better ______ your coat.
#63349
A
take in
B
take away
C
take out
D
take off