—DoyouknowthatMrs.ObamacametoChinawithhermotherandtwoda...

问题详情：

—Do you know that Mrs. Obama came to China with her mother and two daughters?

—Yes. And it is their ______ visit to China.

A. one         B. first          first       D. once

【回答】

B

知识点：数词

题型：选择题