Question

【题目】There are ________ books in the National Library.

A. twenty millions B. twenty millions of

C. twenty million D. twenty million of

Answer 1

【答案】C

【解析】

试题分析：句意：在国家图书馆里有2千万本书。million 百万，跟数词连用时不用复数形式；或者用于短语millions of，成百万的。故选C。