Plants _________carbon dioxide and at the same time _________oxygen. So we may put some in our bedrooms to purify the air.
#65276
A
take in, give out
B
take up, give off
C
take over, give in
D
take off, give up
推荐题目
The mother used to ________her son’s pockets while he was asleep, looking for letters from his girlfriend.
#76793
A
pick out
B
go through
C
deal with
D
look into
Evidence gained from observation and experiment is often used to _______ a scientific theory.
#65501
A
concern
B
confirm
C
consult
D
combine
It was unwise of him to _________ the unreliable data in his speech.
#74921
A
refer to
B
add to
C
belong to
D
point to
Armed police and railway workers were removing snow from the track to _______ a train stuck near Jining in Inner Mongolia.
#76902
A
recover
B
free
C
protect
D
clear