— Do you still remember when we went to Nanjing?
— I can't remember now but ________sometime last summer?
| A．might it be | B．could it be |
| C．could it have been | D．should it have been |
Oh, boy, why are you just playing games all day? Can't you find something ______ doing at all?
| A．practical | B．valuab1e | C．worth | D．positive |
If you love someone, why ______ you chain him to your side, control his emotion, and even make him center on you?
| A．must | B．dare | C．need | D．will |
Some people have no idea that by helping a criminal they could ________with a prison sentence.
| A．come up | B．end up | C．put up | D．catch up |
Will you please also state your earliest delivery date, your terms of payment, and discounts for regular _______?
| A．supplies | B．sales | C．purchases | D．accounts |
Don't ______ to spring-clean the whole house just because my mother is coming---there's no need to do that.
| A．undertake | B．attempt | C．bother | D．hesitate |