Question

mother was cooking while i____the door.

My mother was cooking while I_________ the radio. A．listened to B．have listened to C．was listening to D．am listening to

Answer 1

C 在英文中while引导时间状语从句，通常用进行时态，本题的主句为过去进行时，故while从句也应该用过去进行时，结构为was或were+doing，故本题选C。