what should we do ____?A.to keep healthy B.to keep health C.keeping healthy D.keep health为什么呢
问题描述:
what should we do ____?A.to keep healthy B.to keep health C.keeping healthy D.keep health
为什么呢
答
B
答
A.to keep healthy
答
A 动词不定式作状语‘为了保持健康’