问题
选择题
---How many people will come to Beijing next year?
---It’s hard to say. people ,I think.
A．Million of
B．Millions of
C．Three millions
D．Three millions of
答案
答案：B
根据上文，难说，可知下文为概数，表示概数时million后不加s，前面不加数字，故选B,成千上万的。