Question

His success ____ the fact ____ he had been working hard. A．p

Answer 1

C

lie in在于，that引导一个同位语从句。put in(正式)提出、花费(时间)、插话、安装； lead to导致、结果；get in到站、当选、插话、上车、请来、加入。若单看第一空，lead to也对。