At night plants carbon dioxide and at the same time oxygen. So we may put some in our be

问题补充：

At night, plants carbon dioxide and at the same time oxygen. So, we may put some in our bedrooms to purify the air.

A. take in, give out

B. take up, give off

C. take in, give in

D. take off, give up

答案：

(答案→)A. take in, give out

B. take up, give off

C. take in, give in

D. take off, give up

解析：句意：在晚上，植物吸收二氧化碳，同时散发出氧气，所以我们可以放一些植物在卧室净化空气。第一空填take in吸收，欺骗，理解，take up从事，拿起，开始学，占据，take off起飞，脱下，开始流行，第二空填give out“散发出”，give in“屈服，让步”，give off散发，give up放弃，所以选A。