Question

[Lê Quỳnh Anh]

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

Answer 1

[Dương Hoàn Anh]

Đáp án B