选择填空。(16分)
Mike 每天早上坐出租车去上学，他应该这样说：________
A．I go to school by bike every day.                 
B．I go to school by bus every day.
C．I go to school by taxi every day.
(　　)（2）Li Yan 想知道谁在过山车上，她应该这样问：________
A．What are on the roller coaster?                
B．Who are on the roller coaster?
C．Whose is on the roller coaster?