--- 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
网友回答
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。