Question

---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

Answer 1

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。