(   ) 3. Recycling is good,so don't       bottles or newspapers.

   A. find out   B. hand in

   C. use up   D. throw away

(   ) 2.Try your best        with your parents and they will under- stand your decision.

   A. to talk   B. talk   C. to play   D. play

(   ) 1. We are        with food and clothes by the farmers and workers.

   A. given   B. provided

   C. agreed   D. disagreed

4. Staying up is        (harm,harmful) to your health.

3. The river has been        (pollution,polluted) by the waste prod- ucts from the factory.

2. In order to make a        (life,living) , he had to find more part- time jobs.

1. Now there aren't many manatees―they are        ( dangerous，endangered) .

A: Hi,Sonia. You look very tired.

B_: Oh,bad luck！I don't 1.        you will believe it.

A_: Really? What 2.        to you?

B: Well,I overslept because I stayed up yesterday evening. By the time I got up,my brother 3.        already gotten in the shower.

A: Oh,it's really a bad beginning!B;So,after he got out,I took a quick shower and left home. But 4.       the time I went outside,the bus had already left. 

A_: Oh,my God! B;So I had to run all the way to school. But when I got to school,I realized that I had 5.        my bag at home.

A: I'm really sorry to hear that. Remember to go to bed early tonight.

5. 你不应该让陌生人搭便车。这对一个女孩子来说很危险。

You shouldn't        a stranger         . It's dangerous for a girl.