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。