I ____ in the back of the classroom.I _____ in the back of the classroom.A.was satB.sittingC.was seatedD.seated

I ____ in the back of the classroom.I _____ in the back of the classroom.A.was satB.sittingC.was seatedD.seated
I ____ in the back of the classroom.
I _____ in the back of the classroom.
A.was sat
B.sitting
C.was seated
D.seated

I ____ in the back of the classroom.I _____ in the back of the classroom.A.was satB.sittingC.was seatedD.seated
seat的用法比较特殊．当动词时有两种用法：
1．be seated. 例：they are seated there. 他们坐在那．
2．seat oneself. 例：they seat themselves there. 他们坐在那．
像dress这个单词它的用法也是be dressed . I am dressed in a white coat
I dress myself in a white coat

be seated =sit 这里是过去时态

填sat 可以，seat 是及物动词，用被动，表示被安排在后面坐

be seated 位于，坐在
AB 都没有这种用法
D 是及物动词，后面要有宾语，而这里没有，所以选C