All that can be eaten _______ eaten up.
| A．are being |
| B．has been |
| C．had been |
| D．have been |
Scientists don’t think that a warm winter always has a negative influence on our life,____?
| A．don’t they | B．do they | C．hasn’t it | D．has it |
David knocked at the door for nearly half an hour______Mary opened it, unwilling.
| A．when | B．while | C．until | D．before |
A turning point of the continuously high housing price won’t appear suddenly because there must be a certain process_______many factors lead to the change.
| A．which | B．what | C．where | D．that |
—The trade caused me $500 worth of loss.
--Pity! You didn’t listen to my advice; otherwise, you _________.
| A．would not have taken in | B．might not be cheated |
| C．should not have been taken in | D．would not have been taken i n |
Under the environment of fierce competition, the only way John could imagine____stress was to get tougher by making greater efforts.
| A．handling | B．to handle | C．handled | D．having handled |