16. What time do you often get up?
A. When do you often get up?
B. How do you often get up?
C. Where do you often get up?
D. Why do you often get up?
17. Why do you study English?
A. Where do you study English for?
B. When do you study English for?
C. What do you study English for?
D. Whom do you study English for?
18. May Day is the day when people hold a meeting.
A. May Day is the day in which people hold a meeting.
B. May Day is the day on which people hold a meeting.
C. May Day is the day at which people hold a meeting.
D. May Day is the day on when people hold a meeting.