Of the much factors that contributed to the growth of international tourism in the 1950s, one of the most important was the advent of jet travel 1958.

A progress has been made toward finding a cure for AIDS

Drying food by means olar energy is a ancient process applied wherever food and climatic conditions make it possible.

The most substances expand in volume when they are heated.

Choose the correct verb form:

Our recent _____ in medicine is the development of laser in treating cancer.

Choose the correct verb form:

Although his flight lasted only 108 minutes, its _____ made him a national hero.

From 1905 to 1920, American novelist Edith Wharton was at the height of writing career, publishing of her three most famous novels.

Isle Royale National Park in Lake Superior can only be reached by boat

Pictures of surface the planet Venus was received yesterday from the space probe “Explorer”, which was launched last year.

Manyamny Civil War battles were fought in Virginia than in other state.

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

Either humans and animals learn by experience, and what is learned influences planning and carrying out of simple actions.

 The room is too dark. You’d better need ...............  a bright color.

Near equator , the slant of the Sun’s rays is never great enough cause temperatures to fall below the freezing point.

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

Being the biggest expanse of brackish water in the world, the Baltic Sea is of special interesting to scientists.

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

The most of the energy used in our homes and factories is generated coal, oil and natural gas

The winter storm that racedthrough the area for the last two day moved east today.

Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions: Although its height, Mount Whitney, one of the north America’s highest mountains, is popular with hikers

He warned me to make an eye on my luggage that place was full of thieves