Without these achievements, the opening of the west ____
A: couldn't occur
B: needn't have occurred
C: couldn't have occurred
D: can't occur
A: couldn't occur
B: needn't have occurred
C: couldn't have occurred
D: can't occur
举一反三
- I was really anxious about you. You home without a word. A: mustn’t have B: shouldn’t have left C: couldn’t have left D: needn’t have
- I was really anxious about you．You ____________ home without a word. A: mustn't leave B: shouldn't have left C: couldn't have left D: needn't leave
- If Tom______too careless in the final exam, he______a make-up exam. A: was; couldn’t have taken B: hadn’t been; couldn’t take C: hadn’t been; couldn’t have taken D: have not been; couldn’t have taken
- 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
- It’s only seven o’clock. You____. A: couldn’t have hurried B: mustn’t have hurried C: mustn’t hurry D: needn’t have hurried