给下列句子选择合适的疑问代词填空。
what where when why who whose how which
(1)______ is your little brother’s name? He is Sam.
(2)______are my story books ? They are under your bed?
(3)______does she come to Beijing ? She comes to Beijing by plane.
(4)_______boy is her cousin? The boy in black coat.
(5)______do you come home? At five o’clock.
(6)_______do you visit Summer Palace? Next summer holiday.
(7)_______don’t go to bed now? Because I want to read stories.