1． 单项选择题：(共15小题;每小题1分, 计15分）
1. Pierre wanted to tell us _____ very exciting story, but he couldn't remember _____ end at last.
A. a, the B. an, the C. the, an D. /, a
2. ---How many students do you think are still in the classroom now?
---I am afraid there is ______ in it. It's too late.
A. no one B. nobody C. none D. no
3. I thought necessary for students to take an interest in all subjects.
A. it's B. this C. it D. that's
4. Nowadays of business letters are written in English.
