问题
选择题
To understand the grammar of the sentence，you must break it______ into parts．
A．down
B．up
C．off
D．out
答案
答案：B
考查介词与动词构成的短语。break down损坏，拆散；break up分解，解散，散开；break off （使）分离，（使）脱离；折断；break out爆发；从句意来看，应选择B，你必须将它分开成部分。