单项选择题
A． I think now it is the best time to do business in China, though we have had a 50-year relationship.
B． I believe that we could have done more business with China over the past 50 years.
C． Although our company has a history of over 50 years, we are unable to start our business in China.
D． Despite our good relationship over the past 50 years, we need to find a better time for investment here.