(2013·威海两校模拟) the earth to be flat, many feared that Columbus would fall off the edge of the earth.
A. Having believed
B. Believing
C. Believed
D. To believe
网友回答
A. Having believed
(答案→)B. Believing
C. Believed
D. To believe
解析：选B 考查非谓语动词。句意：许多人认为地球是平的，担心哥伦布会从地球的边缘掉下去。believe与句子主语为逻辑上的主谓关系，且feared与believe无时间上的前后之分，故选B项。