Only one of these books is worth . is no wonder that you look so upset.A. to read;

问题补充：

--- Only one of these books is worth .

--- is no wonder that you look so upset.

A. to read; That

B. of reading; This

C. being read; There

D. reading; It

答案：

A. to read; That

B. of reading; This

C. being read; There

(答案→)D. reading; It

解析：考查词组和句型：第一空填reading，be worth doing 表示“值得做...”。 第二空是It is no wonder that…，难怪…，句意：那些书只有一本唯一值得看。--难怪你看起来那么难过。选D。