The machine might break down someday in the future, ____, you can dial this number for help.
| A．in that case | B．in what case |
| C．in which case | D．in whose case |
Mary made a few changes to the design and made her own needle, _____ saving people a lot of time.
| A．one | B．she | C．that | D．it |
The recent earthquakes have caused concern because they happen _____ population centers and have caused huge damage.
| A．to be hit | B．hitting | C．having hit | D．to have hit |
—Excuse me, could you tell me where the theatre is?
—OK. Look, between the two white buildings _____ the theatre.
| A．are lying | B．lie | C．lies | D．lay |
—What did the miner say after he was rescued?
—He would never forget his stay there _____ he and other 152 miners had a terrible experience.
| A．that | B．when | C．which | D．where |
Although the official didn’t mention any names, everyone knew who he _____.