1 . —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

2 . Zhong Wei told his friends _________ to be back to his hometown.

A．how happy he is	B．how happy he was
C．he is how happy	D．he was how happy

3 . —Do you like the weekly program Readers on CCTV?
— Sure. It’s a great TV program _________ can develop the habit of reading.

A．who

B．that

C．what

D．whose

4 . —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

6 . 请根据上下文内容，将文中划线部分译成汉语或者英语。

“Thank you” is widely used in modern society. It is a very good manner     1     你应该说“谢谢” whenever others help you or say something kind to you. For example, when someone opens the door for you, you should say so. Also, it is polite to say “Thank you” when someone praises you.

“Excuse me” is another polite expression.     2     We use it the same as “Thank you”. When you hear someone say so behind you, it means that somebody wants to walk past you without touching you. It is not polite to interrupt (打断) others while they are talking.     3     If you want to have a word with one of them, please say “Excuse me” first. You should also do so when you want to cough or make any unpleasant noise before others.

In fact,     4     我们经常使用这两种礼貌表达 not only between friends, but also between parents and children, brothers and sisters, husbands and wives.     5     Let's learn to say “Thank you” and “Excuse me” in our daily life.