根据括号内提示的内容写句子。

1．我们要学会依靠自己。（depend on）

2．博物馆很近，为什么不走着去呢?（why not…?）

3．很抱歉让你久等了。（keep sb. doing…）

4．刘翔是中国最受欢迎的明星之－。（one of）

5．班会已经开了半个小时。（for）

    为落实科学发展观，建设资源节约型和环境友好型社会，我国政府决定从今年6月1日起，超市等将被禁止提供免费的塑料购物袋。说明政府治理白色污染的决心。众所周知污染已经成为一个社会性的问题，请结合你身边的现象谈谈你对污染这－现象的认识。可从空气污染，水污染和人们乱扔垃圾谈起，字数不少于80字。

―What are you looking _______?

―My watch. I can’t find it now. Have you seen it anywhere? 

A. up         B. for       C. out       D. back

Bring some ________ to school. You can drink it after having the P.E class.

A. bread      B. apples     C. juice      D. pears 

There ________ many old houses here ten years ago.

A. is         B. was       C. will be     D. were

―Don’t talk in class.

―________.

A. Yes, I will    B. Sorry, I won’t  C. Not at all     D. Don't say that

－Did you have fun at the party last weekend?

－Yes. We enjoyed ________ very much. 

A. ourselves     B. myself        C. us          D. me

Chongqing, our hometown, is one of ________ cities in the world.

A. the biggest    B. bigger        C. much bigger  D. big

―You went to sleep with the TV on last night. 

―Oh, sorry, mom! I forgot _______.

A. turning it off   B. to turn it off   C. to turn it down  D. turning it down

Tibet has been a part of China since _________ years ago.

A. hundred                      B. seven hundreds  

C. hundreds of                   D. seven hundred of