从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. ―Which of the two poems do you like better?
―____ shorter one, of course. I think it’s really ____ most interesting one.
A. The; a B. A; the C. The; the D. A; a
2. ---Mary was asked to do something important.
---It doesn’t matter. Let’s the work where it is left off.
A. take up B. take down C. take in D. take off
3. That was a very busy street that I was never allowed to cross accompanied by an adult.
A. when B. if C. unless D. where
