Question

【题目】Ninety ____ teachers and students plant _____ trees every year.

A. thousands, million of

B. thousand, millions of

C. thousands of, millions of

D. thousand, million

Answer 1

【答案】B

【解析】

试题句意：九万老师和学生每年种百万棵树；注意前边有具体数字的时候thousand不能变复数，当表示约数的时候要和of短语连用，并要变复数。millions of+名词的复数；thousands of,+名词的复数；故选B