课时作业(二十八) [必修5 module 4 carnival] (限时:35分钟) ⅰ.单项填空 1.a few of the young trees on that hill can be cut down each year for firewood. the rest________ to grow even taller. a.left b.will leave c.is left d.are left 2.—how do you find the concert last night? —________. but the conductor was perfect.