Cindy saw a little boy ____________ (lie) u nder a big tree when he passed by.
问题描述：
Cindy saw a little boy ____________ (lie) u nder a big tree when he passed by.
答
答案：lying
lie-lied-lied-lying 说谎 lie-lay-lain-lying躺
答
lying
see sb doing sth 看见某人正在做某事.