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
网友回答
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。