请选择ABC'd6g8X7v+|/?+T My trousers ________ very dirty. I washed them.;_,[(^*u/Y7q9L'C(A8y'F1{9q
A. were;_,[(^*u/Y7q9L'C(A8y'F1{9q
B. is;_,[(^*u/Y7q9L'C(A8y'F1{9q
C. was;_,[(^*u/Y7q9L'C(A8y'F1{9q