People don’t work working．It’s not work itself that’s important to them but such a joy in doing work well．
| A．to the advantage of | B．in harmony with |
| C．not to mention | D．for the sake of |
—What do you think we can do for our aged parents?
—You __________ do anything except to be with them and be yourself
| A．don’t have to | B．oughtn’t to |
| C．mustn’t | D．can’t |
— My cat’s really fat.
— You __________ have given her so much food.
| A．wouldn’t | B．couldn’t |
| C．shouldn’t | D．mustn’t |
— What does the sign over there read?
—“No person __________ smoke or carry a lighted cigarette，cigar or pipe in this area.”
| A．will | B．may |
| C．shall | D．must |
I told your friend how to get to the hotel, but perhaps I __________ have driven her there.
| A．could | B．must |
| C．might | D．should |
—How’s your tour around the North Lake? Is it beautiful?
—It __________ be, but it is now heavily polluted.
| A．will | B．would |
| C．should | D．must |