问题
选择题
—What were you doing when the alien got out of the UFO?
—I _______ in front of the library. [ ]
A. stand
B. standing
C. was standing
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—What were you doing when the alien got out of the UFO?
—I _______ in front of the library. [ ]
A. stand
B. standing
C. was standing
答案：C