结构与词汇总练习.doc

Vocabulary and Structure 1Practice One1._ still an undergraduate, Newton discovered the Binomial Theorem in algebra.A. While B. Being C. He was D. Although2. Of course there _ a time when most of the free land in America had been taken up.A. had come B. did came C. have come D. did come3. Why are you playing here_ you should do your homework?A. while B. when C. once D. as4. I shall be_ pleased_ go skating with you.A