Question

     young trees have been planted along the north of China these years.

A．Million of	B．Millions of
C．Several millions	D．Millions

Answer 1

B

解析试题分析：句意：这些年沿着中国北方种植了数百万棵小树。表示数百万时，million要用复数形式，即millions of, 故选B。
考点：考查数词。