一、用括号内所给词的适当形式填空
1．Please don't tell him about his ________ (ill)．It's a secret.
2．I was ________ (wake) all night and thinking about the matter.
3．The government made a law about the _______________(protect) of the endangered plants.
4．Her ________ (excite) shows us that she has won the match.
5．I know how much the elephant ________ (weight)．
