If penicillin _____________ available, many people ______________ from sickness.
| A．weren’t , would have died | B．shouldn’t be, would die |
| C．hadn’t been, would have died | D．is, will die |
— Hello, may I have an appointment with the doctor?
— ____
| A．Sorry, he is busy at the moment. |
| B．Why didn’t you call earlier? |
| C．Certainly. May I know your name? |
| D．Sorry, he doesn’t want to see you. |
— How about a game of chess?
— ____
| A．I agree. | B．Why not? | C．I’d like to. | D．That’s right. |
— I’m afraid I can’t finish the book this week.
— ____.
| A．Please go ahead | B．That’s right |
| C．Not at all | D．Take your time |
— Don’t forget to take the message to my teacher.
— ____.
| A．Yes, I will | B．No, I won’t |
| C．I don’t think so | D．Sorry, I wouldn’t |
— How many students are going to the Great Wall?
— ____.
| A．None | B．No one | C．No | D．Not any |