问题补充:
It is believed that if a book is , it will surely the reader.
A. interested; interest
B. interesting; be interested
C. interested; be interesting
D. interesting; interest
答案:
A. interested; interest
B. interesting; be interested
C. interested; be interesting
(答案→)D. interesting; interest
解析:前者是作表语,表示“(令人)有趣的”,用interesting,后者是在will后作谓语,用动词原形,表示“使(人)有趣”是interest。