问题补充：
The discovery of gold in Sahara Desert led thousands to believe that a fortune.
A. is made
B. was to be made
C. would make
D. had made
答案：
A. is made
(答案→)B. was to be made
C. would make
D. had made
解析：本题考查动词时态和语态。由前面led的可知此处要用过去的时态；make a fortune发财；赚大钱。此处要用被动语态。
