However, some scientists argue that the historical evidence shows that over time the Earth heats ______ and cools ______ naturally.

This project _____________ by the end of this month.

This road is very narrow. It _____________ to be widened.

It was lovely ………………… you to invite me to your birthday meal.'

It was _________ that we had gone for a walk.

Smoking is extremely detrimental to health, _____ many people continue to smoke anyway.

Many years ago, black children were _____________ to discrimination in many schools.

The authorities recommend that the meeting _____________ next Monday.

He daren’t _____________ his boss for a rise just now.

My mother made me _________ at home at night.

Her husband is very kind. He always cares _____ her and never puts all of the housework her.

As a small boy, he used to _______ alone in the house for an hour or two.

DNA tests ________ accepted in court eases.

The archaeological excavation _____ to the discovery of the ancient city lasted several years.

They'll be able to walk across the river _______.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

We decided to spend ______ summer in ______ seaside town.