问题
选择题
This is Mr White’s ________ trip to Beijing. He has been there twice before.
A. first B. second C. third
答案
答案：C
题目分析：have/has been to去过，句意：他以前已经去过那两次了。可知这是怀特先生第三次去北京旅行。A. first第一，B. second第二，C. third第三，故选C。