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Their work is very dangerous but they never feel afraid .
They must/might /could/ can’t be ... .
What do they do ?
They not only teach us knowledge but also educate us to be good persons .
They must/might /could/ can’t be ... .
What do they do ?
They can make us keep healthy or save our lives .
They must/might /could/ can’t be ... .
What do they do ?
They work hard so we have enough rice to eat .
They must/might /could/ can’t be ... .
What do they do ?
Because they meet different people ,we can know lots of news .
They must/might /could/ can’t be ... .
What do they do ?
While they are performing ,we are enjoying their performance .
They must/might /could/ can’t be ... .
1.Their work is very dangerous but they never feel afraid .
2. They not only teach us knowledge but also educate us to be good persons .
3. They can make us keep healthy or save our lives .
4. They work hard so we have enough rice to eat .
5. Because they interview different people ,we can know lots of news .
6. While they are performing ,we are enjoying their performance .
2a
Match each linking word or phrase with its purpose.(把连词和它表达的目的相匹配)
Linking word or phrase
Purpose of them
so
expressing a difference
（表示不同）