David, get up early, ________ you’ll catch the earlybus.

Liu Xiang’s breaking the world record was an exciting moment, _______all of us will never forget.

The villagers here are very friendly. I am quite sure that you will get along well with them __________ you get to know them.

The girl has a great interest in sport and ____badminton classes twice a week over the last three years

The students entered the classroom, smiling and _____, and _____ down to have their lessons.[ ]