I remembered _____ the door before I left the office, but forgot to turn off the lights.
| A．locking | B．to lock | C．having locked | D．to have locked |
I __________ use a clock to wake me up because at six o'clock each morning the train comes by my house.
| A．couldn't |
| B．mustn't |
| C．shouldn't |
| D．needn't |
-__________ you interrupt now? Can't you see I'm on the phone?
-Sorry Sir, but it's urgent.
| A．Can |
| B．Should |
| C．Must |
| D．Would |
I am going to Europe on vacation together with John if I __________ find the money.
| A．can |
| B．might |
| C．would |
| D．need |
-I regret to say that I failed to rank first in the terminal exam.
-Come on, nobody __________ win all the time.
| A．should |
| B．must |
| C．shall |
| D．can |
-Sorry, Mum. I got a C in the exam.
-You __________ have done better.
| A．would |
| B．must |
| C．could |
| D．shall |