___________ visitors come to China every year．

A．Many thousands of         B．Ten thousands  C．Ten thousand of     D．Thousand of

There are many places of interest in China and it has many beautiful cities. So    visitors come here every year. In winter, about      visitors come to the north of China to feel the taste of the ice and snow.

A. millions of, ten thousands

B. millions of ,ten thousand

C. ten million, millions of