问题
选择题
--What about the protection?
---Let’s keep the surface ____ dirty by putting a cover over it.
A.far from
B.free from
C.apart from
D.away from
答案
答案:B
考查短语:keep sth free from 使某物免受什么,句意:这个保护怎么样?让我们使表面免受脏东西通过在上面放一个盖子。所以选B。