Not only he but also his parents _____China for two years .

_______ do you have a Music Festival at your school?—Once a year.[ ]

He helps his friends ________ their English. [ ]

It’s 9 o’clock now. I must go.—It’s raining outside. Don’t leave ________it stops.

Look! The students are playing on the playground. Some are running, some are playing basketball, ________ are watching.