题目内容：

The book of that kind___better than this one.A.is sold B.will be sold C.sells D.is to be sold

优质解答

选C
此类题强调的是物的质量而非被卖这个动作.
比如 the pen writes smooth.（对）
the pen is written smooth （错）
强调的是钢笔本身滑,而非被写得滑.