问题补充:
In the old days, people lived in caves and they had to make a fire themselves warm.
A. to keep
B. keeping
C. keep
D. kept
答案:
(答案→)A. to keep
B. keeping
C. keep
D. kept
解析:本题考查的动词不定式作目的状语,故选A
如果觉得《In the old days people lived in caves and they had to make a fire themselves warm. A. to》对你有帮助,请点赞、收藏,并留下你的观点哦!