Thegirl()EnglishaloudwhenIcametotheclassroomAisreadingBhasreadingCwasreadingWhileI（）mymotheratthebusstop,ImetoneofoldfriendsAWASwaitingBAMWAITINGCwaswaitingforDamwaitingfor

Question

The girl ()English aloud when I came to the classroom
A is reading
B has reading
C was reading
While I （）my mother at the bus stop, I met one of old friends
A WAS waiting B AM WAITING C was waiting for D am waiting for

Answer 1

The girl ()English aloud when I came to the classroom
A is reading
B has reading
C was reading
答案解析：以上为一个典型 时间状语从句 ,从句表示主句动作发生时间 ,从句意思 ,当我来到教室的时候 ,这个小女孩子正在朗读英语,因此 ,主句用过去进行时态,答案为C
While I （）my mother at the bus stop,I met one of old friends
A WAS waiting B AM WAITING C was waiting for D am waiting for
答案解析 ：答案为为C,while 引导时间状语从句 通常有进行时态,考虑主句为一般过去时态,因此用过去进行时态,