____ loom high above the northern and northeastern boundaries of the expanding city of Tucson.

• The Santa Catalina mountains

• Because the Santa Catalina mountains

• The Santa Catalina mountains are

• That the Santa Catalina mountains

Radioactive ____ provides a powerful way to measure geologic time.

• it

• dates

• dating

• can

____ contained in the chromosomes, and they are thought of as the units of heredity.

• Genes which are

• Genes are

• When genes

• Because of genes

The benefit ____ the study is that it provides necessary information to anyone who needs it.

• of

• which

• that

• because

The same symptoms that occur ____ occur with cocaine.

• amphetamines can

• with amphetamines can

• so amphetamines

• with amphetamines they

Many companies across the country have molded the concepts ____ describes into an integrated strategy for preventing stress.

• and Wolf

• that Wolf

• what Wolf

• so Wolf

____ in the first draft of the budget will not necessarily be in the final draft.

• Although it appears

• It appears

• What appears

• Despite its appearance

If a food label indicates that a food is mostly carbohydrate, it does not mean ____ is a good food to eat.

• and it

• and

• that it

• when

A need for space law to include commercial concerns has been recognized inasmuch ____ been expanding drastically in recent years.

• the commercial launch industry

• the commercial launch industry has

• as has the commercial launch industry

• as the commercial launch industry has

The report on the nuclear power plant indicated that when the plant had gone on line, ____ unsafe.

• and it had been

• it had been

• had been

• that it had been