单项选择题
Though the book is a little expensive，it is（）.
A.very worth buyingB.well worth to be boughtC.well worth buyingD.very worthy buying
单项选择题 It is required that students（）mobile phones at school，so seldom（）them using one.
单项选择题 She is doing the work（）I like it（）.
单项选择题 From his（）voice on the phone I know everything is going under way.
