【题目】I don’t take much exercise now, but I ______ football a lot when I was younger.
A．did play B．do played
C．did played D．do play
在线课程【答案】A
【解析】句意：我现在很少锻炼，但是我年轻的时候的确经常踢足球。do(does, did)+动词原形表示对该动词的强调，根据后面的时间状语从句用一般过去时及句意，故判断空格处也用一般过去时，故强调的助动词要用did，后面是动词原形。故选A。