--- Why do you tennis for exercise? --- To keep healthy. A. take up B. grow up C. stay up
---Have you decided _____? ---______.
Millie _____ for three hours. Please________.
When I walked ____ the playground, I saw a lot of boys _____ there.
---Mum, must I take out the rubbish now?---No, you _____. You may take a rest first.
That’s a bad habit of learning . ___, it is never too late for you to get out of it.