问题
选择题
—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
答案
答案：B
题目分析：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。