If a book is we should try to read it attentively. A. worthy reading B. worth readingC.

问题补充：

If a book is , we should try to read it attentively.

A. worthy reading

B. worth reading

C. worthy to be read

D. worth being read

答案：

A. worthy reading

B. worth reading

C. worthy to be read

D. worth being read

解析：考察固定搭配。固定搭配sth be worth doing某事值得被做。Sth be worthy to be done/of being done某事值得被做。句意：如果一本书值得被读，我们就应该认真地阅读。故B/C都正确。