The old couple have been married for 40 years and never once ___________ with each other.
A.they had quarreled | B.they have quarreled |
C.have they quarreled | D.had they quarreled |
What will people die of in 100 years? If you think that is a simple question, you ______ attention to the revolution taking place in biotechnology.
A.have not been paying | B.had not been paying |
C.were not paying | D.will not be paying |
The government has taken some measures to solve the shortage of electricity, but it may be some time _________ the situation improves.
A.since | B.when | C.before | D.unless |
Mandela, having devoted all his life to the freedom of South African Blacks, is a real fighter for us to_________.
A.live up to | B.come up to | C.make up to | D.look up to |
You cannot imagine what great trouble I took ______ your house.
A.to find | B.finding | C.found | D.having found |
Jordan kept his illness from his opponents before the final game ________ they might know about it.
A.now that | B.on condition that | C.for fear that | D.in order that |