Plastic bottles can be recycled but they need cleaning thoroughly, _______ they?
| A．needn't | B． don't | C．mustn't | D．can't |
I _____ in the street when someone _____ me.
| A．walk; called | B．walking; calling |
| C．was walking; called | D．walked; called |
On AIDS Day, the minister of Health Department demanded that the problems ______ paid special attention to.
| A．referred to being | B．referred to be |
| C．refer to being | D．refer to be |
The shop has been standing so ______ that a thief finds nothing to steal.
| A．quietly | B．lonely | C．empty | D．Open |
They talked for about an hour of things and persons ______ they remembered in the school.
| A．which | B．that | C．who | D．whom |
--Is it all right if I use your car ?
----
| A．It depends | B．Go ahead |
| C．Got it. | D．I don’t care |