It seems that water from this tap ________ for some time.We'll have to take it apart to put it right.
| A．had leaked | B．is leaking |
| C．leaked | D．has been leaking |
The school was built _________ there had once been a church.
| A．where | B．when |
| C．in which | D．that |
—Mom, what did the doctor say?
—He advised me to live _________ the air is fresher.
| A．in where | B．in which |
| C．the place where | D．where |
The WTO can't live up to its name _________it doesn't include acountry that is home to one fifth of mankind.
| A．as long as | B．while |
| C．if | D．even though |
If it _________ the snow, we _________ Simian Mountain last week.
| A．were not ； could have climbed | B．were not ； could climb |
| C．had not been ； could have climbed | D．had not been; could climb |
He insisted that we all _________ in his office at one o'clock.
| A．be | B．to be |
| C．would be | D．shall be |