The shop opens at 8 a. m every day and it _________ from 8 a. m. to 8 p. m.
When you are in trouble(麻烦), you can _________ help _________ the police.
Don’t _________ shorts in the classroom.
The teacher wants his students _________ hard.
She is a reporter. _________ she writes stories late _________night.
The news _________ from CCTV-1.