Put a (n), the, or NO ARTICLE in the numbered blanks by choosing the correct option: A, B, C or D. (Extra passage)
There was a programme on television about dangers to the environment.
There was also (21) .........an........ article about pollution in (22).......the........ paper. (23)………the…………ozone layer will continue to disappear if we don't find way to stop it. (24) …………the……..world's weather is changing. Pollution is having (25) ....an....... effect on our climate. Last week (26) ........an.......... oil tanker spilled oil into (27) .........the.......... sea, damaging wildlife. Some professors have signed (28) ..........a........ letter of protest and have sent it to (29)..........the.......... government. If (30) ........the.......... earth was (31)...........a........ human being, it would be in hospital.

21, an

22, the

23, the

25, an

26, an

28, a

29, the

30, the

31, a