一、单项选择（每小题1分，满分15分）
( ) 1. — Is it _______ only chance for me to watch the show?
— No. The show will be on for second time next weekend.
A. a; the B. the; a C. an; the D. an; a
( ) 2. We must always keep all clear so that people can escape (逃跑) quickly when anything dangerous happens.
A. curtains B. stages C. exits D. speakers
( ) 3. All the Chinese people, at home and abroad, felt when Yutu, China’s Moon rover (月球车), was sent to the moon successfully.
A. nervous B. proud C. surprising D. frightened
