Jim fell off the bike yesterday and hurt his leg badly, so he is _____now.[ ]

____the book if you are free, and you will learn a lot about how to study English .

Do you have any plan for this summer vacation, Mary?— Sure, I’ d like to be a volunteer and help to ______ the Central Park.

Did you watch the basketball match yesterday? —Yes. You know, Jeremy Shu-How Lin, who is one of my heroes, ________ in the match.

Who’s that man over there standing in the garden? Is it Mr. White?—It __________ be him. He has gone to Shanghai on business.