— No one can answer the question we can complete the task in time do you know? — Yes an

问题补充：

— No one can answer the question we can complete 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

答案：

(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。