Walkers can unwittingly damage the fragile environment __________.

In some countries environmental organizations have been ___________ to inform people and gain their support.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The mining (A) of materials often bring about (B) the destruction (C) of landscapes and wildlife (D) habitats.

Do you know the date ___________ we have to hand in the essay?

If you want to send a document and do not want to lose its original shape, our ____________ service will help you.

The school has been given 20 computers, ____________ are brand new.

Lady Astor was the first woman ____________ her seat in Parliament.