什么是一级动火区？
参考答案：
一级动火区系指火灾危险性很大，发生火灾时后果很严重的部位或场所。
—Could you _____ me to the Reading Room?
—This way, please. [ ]
A. let
B. put
C. carry
D. take
These newspapers are free. You ________ keep one if you like.
[ ]
A. may
B. should
C. must
