According to an old story Leif followed Biarni’s directions and sailed to is believed to

问题补充：

According to an old story, Leif followed Biarni’s directions and sailed to is believed to be the coast of present-day Canada.

A. where

B. which

C. what

D. that

答案：

A. where

B. which

(答案→)C. what

D. that

解析：考查宾语从句。sail to“驶往......”，to是介词，后跟宾语从句。宾语从句缺少主语，故用what引导起宾语从句，并在从句中作主语。故选C。