Step1 Check the answers on the Bb(key points and phrases)

　　Step2 Language points

1. demand

demand可用作名词和动词。

demand sth.　要求得到某物

demand to do sth.　要求去做某事

demand that sb. (should) do sth.　要求某人做某事

meet/satisfy one's demands　满足某人的需求

a demand for sth.　对......的需求

supply and demand　供求

①He demanded ________(tell) everything.

②They demanded she ________(go) there together.

③This is a demanding job which ________(demand) patience.

2. opportunity，chance

这两个名词都有"机会"的意思。

①opportunity一般指有利的机会，chance指的机会可能有利，也可能不利，两者后接不定式或of＋doing。如：

He has a chance/opportunity to see the Premier.

＝He has a chance/opportunity of seeing the Premier.　

②chance有"可能性"的意思，opportunity则没有。

有可能做　There is a chance/possibility of sb. doing

＝There is a chance/possibility ＋that从句

＝(The) Chances are that...

③take this opportunity意为"趁此机会"；

take a chance＝take chances意为"冒险；投机"。

④chance可用作动词，opportunity则不能。如：

I chanced to see our old headmaster in the street some days ago.

3. decline，refuse，reject，deny

decline意为"婉谢"(客气礼貌)；还可意为"下降；衰落"；refuse意为"拒绝"(中性词)；reject意为"断然拒绝"(强烈坚决)；deny意为"否认；拒绝给予"。

从用法上看：

decline和refuse后接不定式to do，reject后一般不接不定式。deny意为"否认"时，后接动名词；表"拒绝给予某人"的搭配为deny sb. sth.或deny sth. to sb.。

on the decline＝in decline＝decline　在衰退

decline sth.＝turn sth. down　婉拒

on the decline＝on the decrease　在减少中

a decline/decrease in population　人口的减少

①He ________ to answer my question.

②He was busy and ________ the invitation to his friend's party.

③Some parents ________ nothing to their children.

Step3.Exercises to consolidate

Step4. Homework：

一、 To consolidate what they have learnt in class

　　二、 To finish the rest exercises on paper

　　教后反思