It's necessary that we spend some time after class listening(为什么不用 to listen)to tapes and practice（这里为什么不用ing形式 中间有个and啊
问题描述：
It's necessary that we spend some time after class listening(为什么不用 to listen)to tapes and practice（这里为什么不用ing形式 中间有个and啊） reading and imitating.
in a matter of seconds这个是什么意思
答
spend some time doing sth固定搭配we spend some time after class listening to tapes and/practicereading and imitating. practice和spend是并列的in a matter of seconds 几秒钟的事