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 . —_____Mike is now 17, he is still like a little child.
—Well, that’s because he depends on his parents for almost everything.

A．Even though

B．When

C．Unless

D．If

3 . ______I am at home, my mother keeps pressing me to study all the time.

A．Because

B．When

C．Though

D．Until

4 . 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.