Deserts can be defined as areas that receive ________ average annual precipitation of less than 250 mm.

Question

Choose a, b, c, or d that best completes each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.

Deserts can be defined as areas that receive ________ average annual precipitation of less than 250 mm.

a. a

b. an

c. the

d. Ø

Answer 1

Đáp án b. an