问题：
[单选] It is often easier to make plans than to ________them out．
It is often easier to make plans than to ________them out．
问题：
[单选] How can he do so much work? He ________stay late at the office every evening and take work hom
How can he do so much work? He ________stay late at the office every evening and take work home at weekends．
问题：
[单选] What we have to take________the courses offered only for this term．
What we have to take________the courses offered only for this term．
问题：
[单选] 二氧化碳分压由高到低的顺序是（ ）
二氧化碳分压由高到低的顺序是（ ）
问题：
[单选] 吸入气中C02浓度达20%时，机体会出现（ ）
吸入气中C02浓度达20%时，机体会出现（ ）
A . decrease
B . bring
C . take
D . raise
A . high
B . low
C . down
D . flavored
A . more
B . less
C . fun
D . pickles
问题：
[单选,材料题] By selling special coffee at a coffee cafe, the students are________
By selling special coffee at a coffee cafe, the students are________
