— No one can answer the question we can plete the task in time, do you know?
— Yes, and this is because we don’t know the way the scientist used last time．
A. whether; which
B. if; which
C. whether; in which
D. if; in which
网友回答
(答案→)A. whether; which
B. if; which
C. whether; in which
D. if; in which
解析：第一空考查同位语从句，说明the question的内容，用whether引导，不能用if，第二空是定语从句，the way做先行词，但定语从句中缺少宾语，用which引导定语从句。选A。