16. She has no idea of what the book is about. She ____ have read it very carefully.
A: mustn’t
B: can’t
C: shouldn’t
D: needn’t
A: mustn’t
B: can’t
C: shouldn’t
D: needn’t
举一反三
- She（）have missed the first bus, or she（）be here so early. A: needn't, shouldn't B: couldn't can't C: shouldn't, mayn't D: mustn't, wouldn't
- I didn't see her in the meeting-room this afternoon. She ______ at the meeting. A: mustn't have spoken B: shouldn't have spoken C: needn't have spoken D: couldn't have spoken
- I didn’t see her in the meeting room this morning. She _____ at the meeting. A: mustn’t have spoken B: shouldn’t have spoken C: needn’t have spoken D: couldn’t have spoken
- She ______ left the hospital so soon, for she had not yet recovered. A: shouldn't have B: wouldn't have C: couldn't have D: mustn't have
- We didn't see her at the lecture yesterday. She _______ it. A: mustn't attend B: can't have attended C: would have not attended D: needn't have attended