If the air were clean, we _____ have to wear masks when going out.

I find it hard to understand that foreigner because of his _____.

It won’t be possible to save the Earth if we don’t take _____ right now.

The Statue of Liberty is a major monument in New York which ______ freedom.

The rains of 1993 causing the Missouri river to overflow resulted in one of the worst floods of the 20^th century.

They believe he is the richest man in the world. (to be)

→____________________________________________________________________.

David uses English as his mother ______ because he comes from the UK.

The ______ buried the whole village while people were sleeping in their houses.