人教版九年级下册英语课时练Unit13SectionA（3a-4c）答案

【课前自主预习】

I．英汉互译。

1．take part in       2．turn off  
3．pay for              4．the food chain

5． take action      6．public transportation
7．听说                  8．处于危险中

Ⅱ．1-5 TFTFF

【课堂合作探究】

◇要点突破

1．[对点训练]   ①B      ②take an active part in; join us

2．[对点训练]   ①A      ②afford to pay

3．[对点训练]   ①B      ②A

◇语法聚焦

一、[对点训练]   ①will be planted      ②must be handed

二、[对点训练]   ①Has; watched       ②haven't had

◇达标检测

I．1． polluted      2．harmful      3．methods      4．reusable     5． laws

Ⅱ．1-5 DBCCD

Ⅲ．完成句子。

1． pay for  

2．took part in  

3．has fallen by

4． take action; the sale of  

5．so far

【课后巩固提升】

I．1． law        2．chain        3．transportation        4．sharks       5．industry

Ⅱ．1-5 BDBBC

Ⅲ．句型转换。

1． weren't caught  

2．didn't use/used not

3． have they  

4．can no longer  

5．can't afford

IV． 1-5   DCBEA