问题
选择题
—When did the Shanghai Expo open?
—_____ May lst, 2010. [ ]
A. In
B. On
C. At
D. By
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—When did the Shanghai Expo open?
—_____ May lst, 2010. [ ]
A. In
B. On
C. At
D. By
答案：B
