—Have you ever _______ to bring your homework to school?—Yes. I _______ it at home once last term.
----What’s the matter with you and your friend?----She looks very busy. I want to help her, but I don’t know _____.
-----The light in the office is still on.-----Oh, I forget to _____.
______ my father ______ my mother is able to drive a car. However, they are going to buy a car.
----Lucy,could you help me ______ the heavy box to my room?----Sure, a piece of cake.
----Don’t you think ______ is necessary for friends to trust each other?----Yes, it’s the most important.