English CU - Unit 4 - Page 56 (Grammar)

The team of biologists ____ the effects of pollution on plant for years

The government ____ measures to limit sea pollution by passing new laws in 2000

Overfishing ____ some species to become extinct over the years.

Ecotourism ____ to become popular when I was at university.

The use of fossil fuels ____ the amount of carbon dioxide in the atmosphere in the past few years.

The scientist ____ research on coral reefs since he left university.

Sea levels ____ gradually in the last 10 years.

The journalist ____ writing an article on the Amazon a month ago.

____ North Pole is located in the middle of the Arctic Ocean.

• A

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• The

He can speak many languages, but he can't speak ____ Arabic.

• the

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• an