If a Canadian who is on a 7-day trip to New York buys $ 800 CAN worth of goods, how much should he pay tax on when returning home().

A. China will get much-needed resources and develop its western regions
B. China and the countries involved will benefit from the project in various ways
C. China will develop its railway system and communication with other countries
D. the foreign countries involved will develop their railway transportation, business and tourism

A. had
B. has
C. have
D. having