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v Remember what tissue and paper are worth. For the trees they come

from belong to Mother Earth.

v We should use fewer plastic bags because it will reduce trash.

v He can give his old toy cars away as they are still in good condition.

The highlighted words since, for, because, and as are used to join phrases or

sentences. These words are called joining words or conjunctions. They are used
to show the reason for an action.

A. Join the sentences using the conjunctions given in the brackets.

1. Pareeniti must not burn rubbish at home. It will pollute the air. (because)

2. She is giving her old clothes away. She doesn’t fit into them any more.
(as)

3. Children make something from these boxes. They are so colourful.

(since)

4. Shanu doesn’t use plastic bags. They are not good for the environment.

(for)

5. Children should not set off firecrackers. They cause noise and air
pollution. (as)

6. We must be careful not to waste paper. Many trees are cut down to

make paper. (because)

B. Pair up with your classmate. Think of some ways to reduce, reuse or recycle.
Write sentences using since, for, because or as.

For example :

I should give my old books to poor children since I have already read them.

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