她从小就懂得如何弹钢琴。

She ___has known how to play the piano since childhood.

他知道明天的会议时间。

He ___knows the time of tomorrow's meeting.

她认识这个小镇上的每个人。

She ___knows everyone in this small town.

他一下就能辨别出真假古董。

He ___knows a real antique from a fake one at first glance.