You have to stay behind if your homework before five o'clock.
| A．wasn’t done | B．hasn’t done |
| C．doesn't do | D．isn't done |
He works hard at English ______ he can be an English teacher in the future.
| A．such that | B．in order to |
| C．so that | D．so as to |
— What do you think of swimming?
—It’s not easy, but I won’t ______ I want to be a good swimmer.
| A．put it away | B．pick it up |
| C．give it up | D．turn it on |
_____ you are, _____ mistakes you will make in the exam.
| A．The more careful; the fewer |
| B．The more careful; the less |
| C．The more carefully; the fewer |
| D．The more carefully; the less |
--- By the way, Robert sends his best wishes to you.
--- _____.
| A．It’s nice of him | B．All right. |
| C．Thank you. | D．It’s great. |
Thank you for _____ us to your art festival.
| A．inviting | B．to invite | C．invite | D．invited |