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1) ___ pollution is getting worse.

2) ___ books on my shelf are in alphabetical order.

3) ___ houses in Andalusian villages are often white.

4) We love ___ music.

5) ___ people these days are not the same as they were.

6) We all need ____ money to live.

7) Please take ___ things off that chair and sit down.

8) ___ cars are not used in some places in Mongolia.

9) Captain Kirk of Star Trek said that ___ space was the final frontier.

10) ___ whales of the Baltic Sea are almost extinct.

 

We omit the definite article if we are talking in general and include it if we are being very specific.

In number 3, both are possible because we are being specific (Andalusian villages) but we are still talking generally about this category of houses. The first option is more common.

In number 10, we prefer the article when the noun is followed by "of".

1) Pollution is getting worse.

2) The books on my shelf are in alphabetical order.

3) Houses in Andalusian villages are often white. / The houses in Andalusian villages are often white.

4) We love music.

5) People these days are not the same as they were.

6) We all need money to live.

7) Please take the things off that chair and sit down.

8) Cars are not used in some places in Mongolia.

9) Captain Kirk of Star Trek said that space was the final frontier.

10) The whales of the Baltic Sea are almost extinct.

See explanations of the English definite article talking in general...

Index of English grammar exercises