As students, we ________ study hard to make our country more beautiful and stronger.

Lily and Grace are my best friends. ________ of them are very smart.

He speaks English _____ an American, so we all think he stays in America for many years.[ ]

Miss Fang is ______ English teacher. ________ is a good teacher.

__________ valuable advice it is. It will be of __________ great value to me.