We spend as much time as we can English.A. learnB. to learnC. learningD. have learnt

问题补充：

We spend as much time as we can English.

A. learn

B. to learn

C. learning

D. have learnt

答案：

A. learn

B. to learn

(答案→)C. learning

D. have learnt

解析：句意：我们花费能够学习英语的尽可能多的时间。spend some time/some money (in)doing sth/on sth表示花费多长时间（多少钱）去做某事，故选择C。