问题

__ Peter with his work, but I had a lot of things to do myself.
A:must have helped
B:should have helped
C:needn’t have helped
D:can’t have helped ;
B:should have helped
C:needn’t have helped
D:can’t have helped ;
正确答案是:
同类题型
Eleven people got killed in the accident, ________ the identities haven’t been available.
-__________ can you finish yourhomework, Ben- In thirty minutes.
What’s wrong with him?–The picture he came across____ his memory of a sad story in his childhood.
I’m fed up with these na new direction for their _________energies. How about a football game
Why was _____ you didn’t ask your head teacher for help while in trouble? [ ]