What are the pupils going to do?-------( 他们在上课.)

问题描述:

What are the pupils going to do?-------( 他们在上课.)
The old man ----- been to many cities.
A.has B.have C.is having

They are having a class
A对同一回答者追问超过3条后每次将消耗10个财富值包括3条吗?