It is estimated that at least a million meteors have hit the Earth’s land surface, which is only 25 percentage of the planet.

A lot of people stop smoking because they are afraid their health will be affected and early death

Sharks can detect minute electrical discharges coming from its preys.

The silly, whiny conversation on a child level was meant to create tension and heighten Nancy’s fears and anxiety.

I couldn't unlock it_______ I had the wrong key.

One decibel, which is a unit of relative loud, is the smallest amount of change detected by the human ear

Despite of many attempts to introduce a universal language, notable Esperanto and Idiom Neutral, the effort has met with very little success

You are 200 kilometers far from me. I would visit you more often if you wouldn’t live so far away.

I’m just going to the shops; if anyone rings, tell them I will be back for a few minutes.

Every elementary school teacher ……………. to take this examination.

It is their nearly perfect crystal structure that gives diamonds their hardness, brilliance, and transparent.

What we know about certain diseases are still not sufficient to prevent them from spreading easily among the population

Everyone is ready for the discussion, ________ him.

One reason birds have been so successful is because of their able to escape from danger quickly

The attribution of human characteristics to animals or inanimate objects appears in the mythologies of many cultures is a literacy device called anthropomorphism

The us mint makes frequently coins from cheap alloys that are worth far less the value stamped on them.

Many heavy work that was once done by hand can now be done more easily with the help of compressed air

In the 1970’s consumer activities succeeded in promoting laws that set safety standards for automobiles, children’s clothing, and a widely range of household products.

I never take an umbrella_______ it's raining heavily.

The mail comes at ten o'clock every day_______ Sunday.

The Carbon atoms of the diamond are so strongly bonded that a diamond can only be scratched with other diamond.