—Everyone in my class passed the exam.
—Oh, really？It________difficult.
| A．must be | B．needn’t have been |
| C．can’t have been | D．mightn’t be |
The ground is wet all over, so I’m sure it must have rained last night, ________?
| A．wasn’t it | B．didn’t it | C．isn’t it | D．doesn’t it |
________ is know to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
| A．As; whom | B．What; whose | C．It; whose | D．What; whom |
It was Mr Zhang that helped us out of the trouble. Without his help, we ______ it so easily.
| A．can’t manage | B．mustn’t have managed |
| C．couldn’t have managed | D．couldn’t manage |
With all the money ________, the man had to make a living by begging.
| A．run out | B．to run out | C．used up | D．to use up |
Having studied in America for three years, the young man didn’t change much, ________ a bit fatter.
| A．only to get | B．only getting | C．to have got | D．having been got |