Question

There are about more than five ___________  "left-behind" students (留守学生) in China.

A．million

B．millions

C．million of

D．millions of

Answer 1

A

试题分析：句意：在中国有超过五百万的留守学生。确定的所指时，million不加of,不加s.故选A.
点评：单位数量词，表示确定所指时不加s,不加of；表不确定所指时加s,加of，这是相对于后面直接接名词来讲的。对这种语法是必须掌握的基础语言点要加强记忆。