Most of the students failed in the final exam. It ______ easy.
A: can't be
B: shouldn't be
C: mustn't have been
D: couldn't have been
A: can't be
B: shouldn't be
C: mustn't have been
D: couldn't have been
举一反三
- Most of the students failed in the final exam. It ______ easy. A: can't be B: B. shouldn't be C: mustn't have been D: D. couldn't have been
- 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
- He has been so hard working. He ___ failed in the exam. A: couldn't have B: wouldn't have C: mustn't have
- The room is in a mess; it _____ cleaned. A: can’t have been B: shouldn’t have been C: mustn’t have been D: wouldn’t have been
- This office is very dirty and in a mess; it ________ cleaned. A: can’t have been B: mustn’t have been C: wouldn’t have been D: shouldn’t have been