— The room is dirty.
— I know. It ______ for several weeks.
| A．hasn’t cleaned | B．didn’t clean | C．wasn’t cleaned | D．hasn’t been cleaned |
A well-written composition ________ good choice of words and clear organization among other things.
| A．calls on | B．calls up | C．calls for | D．calls off |
The room is in a terrible m
ess; it ________have been cleaned.
| A．can’t | B．mustn’t | C．shouldn’t | D．wouldn’t |
The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.
| A．what | B．as | C．so | D．that |
So far this year we _______ a fall in house prices by between 5 and 10 percent.
| A．saw | B．see | C．had seen | D．have seen |
I thought we’d be late for the concert, _______ we ended up getting there ahead of time.
| A．but | B．or | C．so | D．for |