I. 单项填空：（共15小题，每题1分，满分15分）
1. Whoever has travelled by train knows how rapidly another train flashes by when it is travelling ______the opposite direction.
A. to B. under C. in D. with
2. Her sense of humor _______ to him enormously.
A. attracted B. appealed C. drew D. paid attention
3. I have _____ all my papers but I still can’t find my notes.
A. looked through B. looked for C. looked after D. looked out
4. The country has already sent up three unmanned spacecraft, the most recent ______ at the end of last March.
A. has been launched B. having been launched
C. being launched D. to be launched
5. When you want to take a taxi, ______ your hand and you can get one.
