When the sky is blue and the sun is shining, you may say to your friends "____________"

Working hours will fall to under 35 hours a week, _____?

We can trust Jim. He is the kind of person who always _____ his promise. 

While the sun is the major source of ultraviolet rays, it is not source only

The weightlifter who allegedly took performance drugs have been named today.

The bold way in which Margaret Mead defined the terms “family” – based as much on choice as on biological relationship – is possibly the most enduring of legacies.

He had to pay a fine, _____?

A coral reef, a intricate aquatic community of plants and animals, is found in warm, shallow, sunlight seas

What caused explosion in the factory it is still unknown

More 10,000 years ago, glaciers moved across the Minnesota region four time, leveling most of the land.

The hreat of being dismissed do not worry me any more because I have started my own busines

No one would have attended the lecture if you told the truth about guest speaker

I passed all my exams - I’m …………!

Because oak trees are highly resistant of storm damage, they usually live long time.

Unfortunately, much of the early history of Zimbabwe is still unknown, for example, we know a little about early patterns of settlements.

Residents in some cities can call an electrical inspector to have the wiring their house to be checked

Choose the best answer to complete the following sentences: Gagarin was the first person to eat and drink in zero gravity.

How much times did Rick and Jennifer have to do the experiment before they obtained  results they had been expecting?

Let’s do something to protect the environment, _____ we?

The Secret Garden, it is a book written years ago for children, has become popular among adults in film version.

Anyone reproducing works without permission of the holders of the copyrights are breaking the law