____ we are developing new technology at such a high pace ,the true challenge is to find new ways of using it.
A. Although B. After C. As soon as D. Now that
you’ve understood all these rules，you’ll have no further difficulty.
A. Unless B. Although C. Until D. Once
______ time, animals have developed many ways to stay away from their enemies.
A. Through B. On C. By D. Over
Let me say sorry to her? No way! I would die I apologize to her!
A. after B. before C. until D. while
--Why didn’t you tell him about the result of the test?
--He rushed out of the room ______ I could say a word.
A. before B. until C. when D. after
________ both sides accept the agreement will a lasting peace be established in this region.
A. Unless B. As long as C. If only D. Only if
