1 . Tokyo Olympic Games will take place ________ July 23rd, but we are not sure if it will be put off.

A．on

B．at

C．in

D．to

2 . 我们计划坐火车，在十月假期开始前一天离开。（现在进行时表将来）
We ________ ________ the train, ________ the day before the October holiday ________.

3 . 这个体育馆在建设过程中采取了很多措施，尊重自然，最大限度地减少对环境的影响。(minimize) （汉译英）

4 . 我写信告诉您我的问题，这个问题困扰了我很长时间。（汉译英）

5 . 在银行排队等了一个小时后，这个女人变得不耐烦，然后离开了。（汉译英）

6 . 从那时起，汤普森太太特别注意泰迪。（汉译英）

7 . 我们经常在业余时间上网冲浪。（surf）（汉译英）

8 . Often working at night, the poachers shoot whole herds of antelope ________leaving only the babies, whose wool is not worth so much.

A．at one time

B．at a time

C．at times

D．at some time

9 . Every animal sleeps, but the reason for this has remained foggy.When lab rats are not allowed to sleep, they die ________ a month.（用适当的词填空）

10 . Cleaner air has been most noticeable. For example, ________ April 3, people living in Jalandhar, a city in the north, woke up to a sight: snow­covered Himalayan mountains more than 160 kilometers away. (用适当的词填空)