— Jason, I have helped you wash your clothes.
— _______________
| A．You’re welcome. |
| B．I don’t know. |
| C．Well done! |
| D．Thank you very much. |
I really don’t know ___________.
| A．how they’ve got so angry with me. |
| B．why have they got so angry with me. |
| C．how have they got so angry with me. |
| D．why they’ve got so angry with me. |
—What should I do, doctor? —______healthy, you should take more exercise.
| A．To keep | B．Keep | C．Keeping | D．Kept |
I will stay with you the doctor comes to help you.
| A．after | B．if | C．unless | D．until |
Nowadays of business letters are written in English.？
| A．two-third | B．two-thirds | C．two-three | D．two-threes |
—Hey, Paul! Don’t you remember me?
—_________. You are Peter. We once were classmates.
| A．Yes, I do. | B．No, I don’t. | C．Yes, I don’t. | D．No, I do |