Having entered the classroom the teacher the book on the desk.A. laidB. liedC. layD. lai

问题补充：

Having entered the classroom, the teacher the book on the desk.

A. laid

B. lied

C. lay

D. lain

答案：

(答案→)A. laid

B. lied

C. lay

D. lain

解析：区别：lie-lied-lied 意为：说谎；lie-lay-lain 意为：位于，后常接状语；lay-laid-laid意为：放，搁，下蛋。