–Do you know ________ tall girl in purple?–Sure. That’s Kate. She is an old friend of mine.
There are about more than five ___________ "left-behind" students (留守学生) in China.
He doesn’t know _________ English because he has studied it for only ________ weeks
She likes musicians __________ write their own lyrics.
Jane studies chemistry ________ asking the teacher ________ help.
They would like to go _____________ for vacation.