Some birds can travel at speeds approaching one hundred miles an hour, and a few land animals can so.

.........that the hope for cancer control may lie in the use of vaccine.

Francis Bacon lived ________ about the same time as Shakespeare.

This book is not really ________. It is a waste of money buying it.

Commercially honey is heated and filtered in order to stabilize and clarity it.

Many small houses and huts were washed away when the river bursted its banks.

Identify the one underlined word A, B, C or D that must be changed for the sentence to be correct: 

Reading requires more lighting than many other activities; therefore, the possibility of comfortable reading greatly vary depending on available lighting and time of day.

While his friends went ________ into the next class, John was kept ________.

He’ll be very upset if you _________his offer of help.

Tucked away in the mountains of Bolivia and Peru, Lake Titicaca are the lowest navigable lake in the world.

Identify the one underlined word A, B, C or D that must be changed for the sentence to be correct: 

At present, solar cells are too expensive and inefficient to use in the commercial generation of electricity

Before she moved here, Arlene had been president of the organization since four years.

Where there is _____ will, there is _____ way.

Jaguarundis are sleek, long-tailed creatures colored either an uniform reddish brown or dark grey.

The rock formations in the Valley of Fire in Nevada has been worn into many strange shapes by the action of wind and water.

A smile can be observed, described, and reliably identify; it can also be elicited and manipulated under experimental conditions.

The word “scuba: is actually an acronym that comes of the words “self-contained underwater breathing apparatus”.

Many of the population in the rural areas is composed of manual workers.

Choose the best answer:

I can't get my car ........... in cold mornings.

The bodies of cold-blooded animals have the same temperature surroundings, but those of warm-blooded animals do not .

AIDS can be transmitted by practicing unsafe sex and receive tainted blood from one who is already infected.