Some plants can take in carbon dioxide we breathe out and give ______ oxygen to us.
#26444
A
in case
B
in turn
C
in return
D
in addition
推荐题目
_____ your help, we _____ complete the work in time.
#28960
A
Thanks to; were able to
B
Thanks to; could
C
As; would
D
Because; had to
Traditional Chinese medicine is thousands of years old and has developed _______ time．
#26345
A
over
B
in
C
on
D
of
By sending text messages or chatting online, we’ve been in touch for months, but I’ve never met my new friend _____.
#25437
A
by accident
B
on purpose
C
in the flesh
D
in her absence
Your attention should be focused ______ your homework rather than TV programs.
#25778
A
on
B
into
C
to
D
for