下列词语中加点的字，每对读音都不相同的一项是（ ）

_____all over the hills and around the lake are wild flowers of different kinds.

The lazy boy is expecting a way________he can get through the exams without hard work.[ ]

The old man has a lot of money, he isn’t happy .

21．—The earthquake haskilled over two thousand people in Yushu.—________.