用括号里的词适当形式填空。（共5分，每题1分）
(1)You should           (stay) in bed.
(2)A lot of fruits       (be) good for you.
(3)What’s wrong with         (he)?
(4)Let’s       (cross) the street.  The light is green.
(5)What’s the matter with Gogo?  He          (hurt) his leg.