英语选择题,求解,并解释.

问题描述:

英语选择题,求解,并解释.
there was a fire last night , but the firemen _______.
A.put down it B.put it down C.put out it D.put it out

D 把它扑灭
分析:动词与副词组成的词组,代词作宾语要放中间,排除A与C ,而B 放下
加油!不明白再问!