Ⅰ. 单句语法填空
1. There are now only 5, 000 tigers, and most of them live in nature reserves (reserve).
2. The farmer gained a lot of experience by observing (observe) the growth of his vegetables.
3. Massive ice sheets in the Arctic are melting at alarming (alarm) rates and causing the sea level to rise.
4. The man was walking in the woods when he was attacked (attack) by a snake.
5. The medicine is an effective (effect) cure for a headache.
6. He is recovering (recover) now. There is no need to call in a doctor.
7. The patient had to have one of his legs removed(remove) because of infection.
8. It is a big surprise to learn that you intend to spend (spend) your winter holiday in China.
9. Drunk driving not only affects our daily life, but may also threaten(threat) people’s lives.
10. As we all know, water exists(exist) in three forms: solid, liquid and gas.
11. As far as I’m concerned (concern), the best season for me is spring.
12. The picture on the card reminded me of an event happening in my childhood when I was six.
