1 . The population of China may grow more slowly ________.

A．from time to time	B．long long ago
C．once or twice	D．in the future

2 . 外面正在刮大风，你最好待在家里。
The wind is blowing strongly outside, so you’d better stay ________.

3 . 他每天花费一个多小时来运动。
He spends ________ ________ one hour doing exercise every day.

4 .
1. ______________一瓶……
2. ______________……的关键/钥匙