They ______us because of the noise then.
A: mustn’t have heard
B: needn’t have heard
C: couldn’t have heard
D: might not heard
A: mustn’t have heard
B: needn’t have heard
C: couldn’t have heard
D: might not heard
举一反三
- We___them because of the noise from the river then. A: could not have heard B: must not hear C: need not have heard D: may not hear
- Till then, John ______ from his sister for about half a year. A: hadn’t heard B: didn’t hear C: hasn’t heard D: won’t have heard
- When I heard the noise in the next room, I couldn’t resist have a peep.（） A: chance B: look C: visit D: try
- There was so much noise that the speaker couldn't make herself ______. A: heard B: to hear C: hearing D: being heard
- — I cannot find Tom anywhere.— He _________ have been off long. I heard him make a call just now. A: shouldn't B: can't C: mustn't D: needn't