- Yes, go ahead. 可以，开始吧。

ahead of 在......之前；领先于；胜过

ahead of time = in advance 提前

go ahead with 继续

单项选择。

- Could I ask you a rather personal question?

- Sure, 　　　　.

A. pardon me B. go ahead C. good idea D. forget it

【答案】B　

3. by accident偶然；无意中；碰巧

Last time I met her in the street by accident. 上次我偶然在街上遇见她了。

I only found it by accident. 我只是碰巧找到它的。

Many of the great early models fell into the profession by accident.

许多伟大的早期模特都是偶然进入这个行业的。

by contrast 对比之下 by the hour按小时 by mistake 错误地

by and by不久；很快 by hand 用手工

单项选择。

- How do you find the movie?

- 　　　　. The story is good, and the scenery in it is terrific.

A. It's not to my taste B. It all depends