选择方框内所给短语的适当形式填空(共6小题;每小题1分,满分6分)
小题2:Instead of _______ his time and energy ______ his studies, he wasted a lot of his time playing games. 小题3:Some people believe that the world is sure _________disaster if we go on destroying the environment like this. 小题4:Our head teacher often encourages us ___________ in class discussions and share opinions with our classmates. 小题5:Opening the door, the man was shocked to find that ________ some old books, there was almost nothing left. 小题6:Many high buildings have sprung up in our city in recent years, making it _______ a new look. |