【课前自主预习】
短语互译
1．make a difference
2．take part in
3．turn off
4．pay for
5．be full of
6．clean up
7．play a part in...
8．cut down
9．instead of
10．hear of
11．in fact
12．so far
13．lead to
14．take action
15．在……顶端
16．切除
17．对……有好处
18．对……有害
19．处于危险中
20．过去常常做某事
21．尽力做某事
22．不再
句型在线
1．drop; will bring;to
2．So far; have shown; are good for
3．for; with;to use
【课堂互动探究】
词汇点睛
①（1）have the advantage of （2）To her advantage
② 1．（1）D （2）A 2． cost
③ is harmful to
④（1）science （2）scientist （3）scientific
⑤ take part in; unless
⑥ 1．D 2．afford to go
⑦ A
句型透视
①条件；一般现在时；一般将来耐
A
③ 1．（1）A （2）A
2．（1）lt's interesting to play computer games．
（2）lt's easy to answer the question．