Complete the sentences with suitable clauses/phrases: 

There was a little rain yesterday. If it had rained heavily, we could have gone out. (3rd conditional)

Though junk foods look appetizing they are harmful. We should avoid them.

Opportunity does not always come. You would have succeeded in life provided that you had worked hard. (3rd conditional)

The old man is very weak. He walks very slowly lest he might fall (sub + should/might + v1)

The amount of waste is growing rapidly all over the world and polluting the environment. It is high time we stopped throwing waste here and there. (Past Indefinite) / to stop throwing waste here and there. (Infinitive)

I wish I  I were a poet would express my feelings in my poems.
 

English is an international language. We need to learn it as it is used all over the world.

Kiran got a foreign scholarship. She was so happy that she could not hold her tears.

It was my first lecture. I was too nervous to take the class.

Manners define a man. We always appreciate a person who has manners.