题目内容：

What were you doing yesterday afternoon?— We were singing ____.A.all the time B.always C.on t
A all the time B always C on time D in time

优质解答

选A
排除法：always虽然也意为“一直,总是”,但它是用在主语后面的!并不能用在句尾!
on time 是准时的意思
in time是及时的意思,放到句子里不通呀!