问题补充:
Thousands of foreigners were to the Shanghai World Expo the day it opened.
A. attended
B. attained
C. attracted
D. attach
答案:
A. attended
B. attained
(答案→)C. attracted
D. attach
解析:动词辨析。A参加;B达到,实现,获得;C吸引;D附着;句意:在上海世博会开始的那一天,成千上万的外国人被吸引来参加。故C正确。