卫生类辅导资料:倒装句Only if you sleep
（1） Only if you sleep， are you spared the unending cry of" You Need It！ Buy It Now！"
（2） Should questions arise， the students will be able to talk directly to the teacher on individual "intercoms" without disturbing the rest of the class.
（3） No sooner has he got used to one routine than he has to change to another.
（4） An organism may create its own environment， as do warm-blooded mammals.
（5） So efficient and economical was this new system that he cut the price of his cars in half.
（6） As only from above could they really see the extent of their handiwork.