— Could you give me a ride to the railway station? I’m going to be late.— I’ll take the nearest route. You ________ be in time for the train.

 —Whose book is this? —It _____ be Mary’s. Mo Yan is her favorite author. —No, it ____ be hers, she never brings novels to school.

—Are you going to help him?—Why  ___ I help him? He' s never done anything for me．

-----Where is my key? I remember I put it here yesterday.--------You ______  it in the wrong place.

----I am really surprised that a policeman in his car __________ have hit several common pedestrians, killing one and injuring three.----Yes, If one __________ ask for trouble, what can we say?