题干
You should ________ your actions.
A：be thirsty for
B：be responsible for
C：separate from
D：catch up
答案(点此获取答案解析）
B
You should ________ your actions.
A：be thirsty for
B：be responsible for
C：separate from
D：catch up
=3，则分式 
的值为（ ）