When is the film ________ ? [ ]
A. begin
B. start
C. on
D. show
答案：C
My friend ___________ strong. [ ]
A. is
B. has
C. are
对于旅游者自己购票的娱乐性舞会，导游是否参加自便，但无陪舞的义务。 （ ）
