高等教育 / 新发展英语综合教程（二）
He must have been there before, _ _ _ _ _ _ _ _ ?
A.hasn''t he
B.haven''t he
C.doesn''t he
D.isn''t he
A.hasn''t he
B.haven''t he
C.doesn''t he
D.isn''t he
参考答案：
佳题速递：