1 . —I hope I can take part in the game show Who is Still Standing and win something.
—Stop daydreaming. You will win nothing ________ you spend a few months preparing for it.

A．since

B．unless

C．if

D．because

2 . —It has been much easier for me to go to work          shared bikes appeared.
— But they also caused plenty of problems.

A．since

B．before

C．unless

D．though

3 . —What do you think of your junior high school life?
—I think it is enjoyable,   _________ I sometimes have some trouble in study.

A．if

B．though

C．while

D．until

4 . When we work, we must practice our skills constantly and continuously ________ we excel in what we do. （用适当的词填空）

5 . In the summer of 1405, Zheng He, one of China’s greatest explorers, set sail from Taicang on his first voyage. A fleet of over 200 ships navigated the blue seas. It would take 500 years _____________ a larger fleet sailed the seas. (用适当的词填空)

6 . At the same time, Miss Brown quickly opened the classroom door,____________________ it became damaged during the shaking and could not open. (根据句意填空)

7 . 约翰，坐在我能看见你的地方。
John, sit ________________. (where引导的地点状语从句)

8 . 无论什么时候你来到这家书店，你总会看见一些求知似渴的人。(whenever引导让步状语从句) （汉译英）

9 . 每当我必须演讲时，在开始前，我都变得非常紧张。(whenever引导时间状语从句) （汉译英）

10 . 请根据上下文内容，将文中划线部分译成汉语或英语。

I am worried about China’s car problems. More cars are now available, and     1     我们道路上的车子比以前更多了。There will be 140 million cars on our roads by the year 2020. That’s almost seven times the number of cars on our roads now. The increase in the number of new cars has already blocked roads.     2     Pollution is already a major problem and it will get much worse.     3     The sky is often a yellow-brown color in big cities. There are more road accidents in China than other countries.    4     Traffic problems and road accidents will get much worse in the future.

Cars can be very useful, but they also cause a lot of damage.     5    我认为人们在买车前有必要三思而后行。I also think more should be done about our country’s car problems.