Mark the letter A, B, C or B on your answer sheet to indicate the correct answer to each of the following questions.

Hundreds of species of Hawaiian flowers have become extinct or rare __________ land development and the grazing of wild goats.

A. now that

B. due to

C. because

D. for

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Species become extinct or endangered for _______ number of reasons, but the primary cause is the destruction of habitat by human activities.

A. ∅

B. a

C. the

D. an

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Species become extinct or endangered for _______ number of reasons, but the primary cause is the destruction of habitat by human activities.

A. Ø

B. a

C. the

D. an

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Toxic chemicals in the air and land have driven many species to the ______ of extinction.

A. tip

B. edge

C. verge

D. border

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

Toxic chemicals in the air and land have driven many species to the _______ of extinction.

A. tip

B. edge

C. verge

D. border

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Many rare and precious species are now _______  the verge of extinction.

A. in

B. from

C. on

D. by

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Many rare and precious species are now the verge of extinction.

A. in

B. from

C. on

D. by

Mark the letter A, B, C or B on your answer sheet to indicate the correct answer to each of the following questions.

Some species of rare animals are in _________ of extinction.

A. danger

B. dangerous

C. danger

D. endanger