请问,the novel i bought last week is worth _____,i think.

问题描述:

请问,the novel i bought last week is worth _____,i think.
a.reading b.being read c.to rea d.to be read
我觉得该选b 表示被读,可是错了,请问为什么呢?

固定用法,
还有,the book sells well(这本书买的很好)而不是被卖的很好.
the pen write well(这只笔用起来很好)而不是被用起来.