--- Whose book is this ?---It _____ Tom’s . There is his name on it .A. can’t be B. must be C. can be
-Where _______ the 2008 Olympic Games _______?. -You don’t know? Beijing!
______ he is very busy, Li Ming always helps others.
The visitors our factory two days ago.
The story happened ________ the 19th century
Sign means “please don’t park your car here.”