问题
选择题
The United States signed up on Friday for the 2010 Shanghai World Expo, _________ it the last major country to join the event．
A．making
B．made
C．to make
D．having made
答案
答案：A
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The United States signed up on Friday for the 2010 Shanghai World Expo, _________ it the last major country to join the event．
A．making
B．made
C．to make
D．having made
答案：A