Hardly he had entered the offic when he realized that he had forgotten wallet 

.............. hard he has worked, he hardly supports his family of ten people.

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

Unlike wood, paper, and fabric which tendency to disintegrate after being buried for many years, ceramics and glassware although easily broken, survive well in ground.

Contrary to popular belief, bananas are grown on the soft stalk of a leafy plant and not on trees with wood trunks.

A seismograph oscillation of the ground caused by seismic waves, vibrations that travel from its point of origin through the Earth or along surface

So far most a million different species of insects have identified and named.

When Keith visited Alaska, he lived in a igloo in the in the winter months as well as in spring.

In 1950, it was naively predicted that eight or ten computer would be sufficient to handle allscientific and business needs in the United States.

The basic law of addition, subtraction, multiplication and division are taught to all elementary school students

The surface conditions on Mars are the more similar with the Earth’s than those of nay other plane in solar system.

Because of their color and shape, seahorses blend so well with seaweed in which they live that is almost impossible to see themselves

Choose the word or phrase among A, B, Cor D that best fits the blank space :
If boredom …….., there are plenty of windows from which to admire the ever-changing scene as the International Space Station orbits the planet every 90 minutes.

Society changes, but not change at the same rate or in the same direction.

Chemical engineering is based on the principles physics, chemists , and math

In that age of computers, it is difficult to imagine how tedious work of accountants and clerks must have been in the past.

In 1991, Antonia Novello, Unites States Surgeon General launched several programs to address particular problem that young people have.

Today there is an unusually large amount of students in class

The federal government recommends that all expectant women will not only refrain from smoking also avoid places where other people smoke

Protecting Florida’s coral reefs is difficult because some of the corals are very fragile even the touch of diver’s hand can kill it.

The journalist has not finished the article on negotiation already.