Traditionally, the flag is .......... in the morning and taken down at night.

A .............. mountaineer reached the top of the Himalaya last week

Civil engineers had better .............. to use steel supports in concrete structures built on unstable geophysical sites

The corals can be divided into three groups, two of which ............. extinct

I didn't enjoy this book on how to succeed in business. It wasn't very.................

Without alphabetical order, dictionaries would be ............... to use.

One way to inform the public about factories that pollute the environment is through ............ programs on TV.

Supersonic transport .......... the Concorde will probably be widely accepted as soon as problems of noise and atmospheric pollution are resolved.

I was shocked ........... the news of the crashed plane.

The exam results could .............. your career.

Green and magneta are complementary colors located opposite each other on the color wheel, ................

Nitrogen must be .......... with another element such as hydrogen or oxygen to be useful in agriculture or industry

A vacuum will neither conduct heat nor ..............

Because .............. food is as nutritious for a baby as its mother's milk, many women are returning to the practice of breast feeding.

All the cereal grains ........... grow on the prairies and plains of the United States.

Anyone reproducing copyrighted works without permission of the holders of the copyrights .............. breaking the law.

Optical fibers ............. to deliver laser light.

I need to earn ........... money, but then I lost my job.

If the oxygen supply in the atmosphere ......... replenished by plants, it would soon be exhausted.

John F. Kennedy was the youngest president of the United States and ........... to be assassinated.

A ............. is a person who searches for valuable minerals.

Jane Addams had already established full house in Chicago and ............ her work in the women's suffrage movement when she was awarded the Nobel prize for peace.

Since lightning was probably significant in the formation of life, understanding it might help us ________ life itself

Your mistakes in composition are similar ............. his

Often a team of engineers is ..............

Starfishes and sea urchins, members of the echinoderms or spiny skinned animals, are particularly ........... because of their unusual structures

Three dangerous criminals escaped ................. prison yesterday.

Every country ........... a national flag

All of them are freshmen, ............................ whom come from countryside.

To relieve pain caused by severe burns, prevent infection, and treat for shock, ...............

The practical and legal implications of euthanasia, the practice of causing the death of a person suffering from an incurable disease, are so controversial .......... it is illegal in most countries.

In ancient times and throughout the middle ages, many people believed that the earth ........... motionless.

................. thought was given, but all was not approved.

The extent to which an individual is a product of either heredity or environment ............ but several theories have been proposed

Double-star orbit ..............

................ poetry is more enjoyable when it is read aloud.

In 1975, according to the national center for health statistics, the average life expectancy for people born during that year ............... 72.4 years

The flag of the original colonies may or may not have been ............ by Betsy Ross during the revolution.

Goods for sale at ............... prices.

Oscillatona, one of the few plants that can move about, ............ a wavy, gliding motion.