分词Can those____at the back of the classroom hear me?Asit B s

seat 是【及物动词】,如果用主动式seating,后面必须有宾语,强调动作.
根据语境这里强调的是状态【坐在（教室后面的）】
be seated 表状态,如同 be dressed 穿着.
Can those seated at the back of the classroom hear me?
=Can those 【who are】seated at the back of the classroom hear me?
=Can those 【sitting】 at the back of the classroom hear me?

Can those____at the back of the classroom hear me?
Asit B seated C seating
选B
Can those seated at the back of the classroom hear me?=Can those who are seated at the back of the classroom hear me?=Can those who are sitting at the back of the classroom hear me?