Question

【题目】Have you ever been to the Great wall? Every year tourists visit it.

A. million B. millions

C. million of D. millions of

Answer 1

【答案】D

【解析】

试题分析：句意：你到过长城吗？每年数以百万计的游客参观它。millions of数以百万计的，固定结构，故选D。