Don’t throw litter around. Please__________.
---- Do you mind if I sit here? ---- ___________.It’s for Mr Brown.
----Mum, I think I’m _______ to get back to school. ---- Oh, my dear. You’d better stay at home for another day.
______ your parents strict_____ you _____ your study?
----I think it’s impossible for us to work out the plan in just two days. It’s too difficult. ----You’re right. We can’t be _______ careful and hard while working on it.
The teenagers usually have many problems at school, and they don’t know ________ them, so we should give them some help.