-- 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
— So many problems! I’m too tired. — You should try to _____________ them by yourself. You’re not a child any longer.
#54481
A
get over
B
get off
C
get on
D
get into
--Hello, Sandy. This is Jack. What are you doing?---I’m watching a match. It started at 7:00 p.m. and _____ on for another an hour.
#58631
A
has been
B
was
C
had been
D
will be
She has __________ close friends so that she really doesn’t know __________.
#52347
A
many; who to talk
B
few; who to talk to
C
much; what to do
D
little; how to do