Great as Newton was，many of his idea _ today and are being modified by the work of scientists of our time.A.are to challengeB.may be challengedC.have been challengedD.are challenging
...p on his head, as a result of undertaking breakdancing training up to five times a week for 19 years, that he had surgery to remove it.这句话最后为什么要加个that？在这里什么意思？
...Although the bed was smashed to pieces; the man was miraculously unhurt. When he woke up, he was still on the mattress.虽然床被摔得七零八落，这个男的神奇般地没有受伤，当他醒过来后，他仍然躺在床垫上。所以按照我的理解这个青年人直到床撞到地上...
... to prevent you from reading or
sleeping. However you decide to
spend your time, one thing is certain: you will
arrive at your destination fresh and uncrumpled. You will not have to spend the next few days recovering from a long and
arduous journey.以上是新概念3-44：请教老师：为什么...
...e’s always“War and Peace,”which I’ve covered some distance several times, only to get bogged down in the “war”part, set it aside for a while,and realize that I have to start over from the beginning again,having forgotten everyone’s name and rank. How appealing to simply fall back on a ...