Officials believe that more than one person _____ for the big fire.
| A．is to be blamed | B．should blame | C．should be blaming | D．is to blame |
We must take all possible measures _________ to improve working conditions.
| A．tend | B．tending | C．tended | D．being tended |
The description was pretty __________, so the police couldn’t figure out the portrait of the criminal.
| A．vague | B．accurate | C．particular | D．vain |
After three hours’ climbing , they reached they thought was the place they’d been dreaming of .
| A．what | B．which | C．where | D．that |
I showed an old friend of mine around the city,surprise, the changes had been so great.
| A．whose | B．which | C．to whose | D．to which |
Unfortunately, when I arrived she ________, so we had only time for a few words.
| A．just left | B．had just left |
| C．has just left | D．was just leaving |