Question

【题目】（题文）—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

C. the first D. once

Answer 1

【答案】B

【解析】

试题句意：你知道奥巴马夫人和她的妈妈和两个女儿来中国了吗？是的，这是她们第一次来中国。根据题意“第一次”应用序数词，因空前有their，所以不用定冠词the，故选B。