______we have enough evidence, we can’t win the case.
| A．Once | B．As long as | C．Unless | D．Since |
— 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 |
—Where is my dictionary? I remember I put it here yesterday.
—You __________ it in the wrong place.
| A．must put | B．should have put |
| C．might put | D．might have put |