At night, plants _________carbon dioxide and at the same time _________oxygen. So, we may put some in our bedrooms to purify the air.
#64170
A
take in, give out
B
take up, give off
C
take in, give in
D
take off, give up
推荐题目
In every communication, information ______ by gestures is always easy to misunderstand.
#66915
A
suggested
B
transported
C
expected
D
signaled
The teacher told the monitor to ______ all the students' names who were absent from class.
#82478
A
set out
B
set about
C
set up
D
set down
Such food doesn’t keep long. You may as well it in fridge.
#69374
A
compensate
B
process
C
preserve
D
reserve