2. Then let Ss ask and answer questions about the predictions in 1a. Then make their own conversation.

注意：如果将陈述句变为一般疑问句，应将情态动词will 提前到主语前便可。

3. Let some pairs ask and answer about their conversations.

Ⅵ. Learn some new words

pollute, prediction, future, environment, planet, plant, play a part in

辨析more, few, less

more是many和much的比较级，可用来修饰可数名词复数形式和不可数名词；

fewer是few的比较级，可用来修饰可数名词复数形式；

less是little的比较级，可用来修饰不可数名词。如：

　I'm sure that you will get more letters next month.

　Mrs. Smith will spend more time with her children.

　Fewer birds will come here next year.

　We must try to spend less money.

【运用】根据汉语意思完成英语句子。

1. 更多的孩子将加入这个俱乐部。

__________________ will join the club.

2. 十年以后这里的水将更少。

There will be ________ here in ten years.

3. 今年动物园里的动物似乎更少了。

There seem to be _____________ in the zoo this year.

Keys: More children / kids ， less water, fewer animals

Ⅶ. Listening

Work on 2a:

1. Read the sentences in 2a. Tell Ss they will listen to some sentences. They should listen and circle the words in the bracket.

2. Play the recording for the Ss to listen and circle the words.

3. Play the recording again to check the answers.

Work on 2b:

1. Let Ss read the sentences below. Explain some main sentences for the Ss. Make sure they know what to do.