—I’m sorry I went out for a smoke. I was very tired.—There’s no for this while you are at

问题补充：

—I’m sorry I went out for a smoke. I was very tired.

—There’s no for this while you are at work.

A. cause

B. excuse

C. matter

D. choice

答案：

A. cause

(答案→)B. excuse

C. matter

D. choice

解析：词义辨析。Cause指的是“原因”；excuse指的是“借口”；matter指的是“麻烦事”；choice指的是“选择”。根据句意：在上班时没有借口出去抽烟。