—I can’t stop smoking, doctor.
— For your health, I’m afraid you________.
| A．must | B．have to | C．will | D．can |
It is said that potato chips ____________ by mistake about a hundred years ago.
| A．invent | B．invented | C．are invented | D．were invented |
She told us a story. Her voice sounded ___________.
| A．clearly | B．sadly | C．sweet | D．small |
__________nice weather！Let’s go out for a walk.
| A．What a | B．What | C．How a | D．How |
The girl with glasses is my sister. ________ is a nurse.
| A．She | B．He | C．You | D．I |
--Would you like to come over for dinner this Friday evening?
-- ________
| A．What time to go? | B．I'd love to. |
| C．Sorry. It costs much time. | D．Sorry, I have a ticket for a film. |