1 . 既然你已经满十八周岁了，你就应该自己做一些决定。
____________, you should make some decisions by yourself.

2 . Keep an eye on your pet’s water. Sometimes owners don’t realize that a water bowl _________(freeze) and their pet can’t get anything to drink. （所给词的适当形式填空）

3 . 考虑到他到中国才一年，他的中国话讲得很不错了。(given)
He speaks Chinese quite well, ______.

4 . So far the work ______ easy but things may change. Therefore, we should still keep being cautious.

A．is

B．was

C．has been

D．will be

5 . Each means ______to solve the problem, but none is effective.

A．have been tried out

B．were tried out

C．is tried out

D．has been tried out

6 . Described as the worst disaster in the region in a century, the quakes have affected more than 13 million people in the city and ______ (destruction) over 214,000 buildings. (所给词的适当形式填空)

7 . 为了更多地了解中国文化，汤姆决定报名参加一个汉语俱乐部。(汉译英)

8 . 这座城市在过去的五年中经历了巨大的变化。(undergo) (汉译英)

9 . Human impact on the animal kingdom, such as hunting and destruction of habitats, ___________a reduction in the population of certain species in the past three decades.

A．has caused	B．have caused
C．was causing	D．were causing

10 . Since 1993, the number of people living in Old Montreal ________ from 100 to 6, 000.

A．has grown

B．have grown

C．is growing

D．are growing