---Could you please pass me the book? ---
| A．Yes, I could. | B．No, I couldn’t. |
| C．Sure, here you are. | D．No, that’s no problem. |
I’m sorry to keep you _______ for almost two hours.
| A．wait | B．to wait | C．waiting | D．waited |
He looks very pale. He may have _______ fever.
| A．an | B．a | C．the | D．/ |
When the traffic lights are red, we _______ stop.
| A．should | B．might | C．must | D．may |
—Oh, you have a headache and a cough. __________ have you been like this?
— Two days.
| A．How long | B．How often | C．How old | D．How many |
Would you mind _________ the piano softly ?
| A．to play | B．playing | C．played | D．play |