Nothing is more certain than that every trace of Hilter's
footsteps,every stain of his infected and corroding fingers, will be sponged
and purged and, if need be, blasted from the surface of the earth.请教that的作用和成分,是引导主语从句吗?
—It's really great to have a computer to store my photos.—Don't count on it too much. It break down and you'd better make a copy of them.A. must B. can C. should D. will老师,这题表示可能,C和D,为什么不能选呢?
So, inventors deserve a reward forthe amount of time they spend developing their ideas.They also need the security of knowing that if they share the invention with the rest of the world, nobody will steal it....这两句话中,for 和 If 是引导的状语从句吗?