—What are you busy with?
—The sports meeting ______ in our school next week.

I think you should think twice .Once ______, the decision won’t be easily changed .

Which material can be thrown into the sea ________ on the nature of the material?

The audience ______ before TV sets are listening to Yi Zhongtian’s stories with their eyes _____ upon him.

Entering the room, I found Mary _______ at the desk and _______ a letter.

The sunlight is white and blinding _______ hard-edged shadows on the ground.

At the routine office meeting, the headmaster insisted that the problems _______ paid special attention to.

_______ basic first-aid techniques will help you respond quickly to emergencies.

Though _______ money, his parents managed to send him to university.

We all like the photographs _____ by our teachers.