请选择ABCD,[3I0a'n,C6Q'^(j When Jack arrived, Mary ________ for almost an hour.2A'p/\*A/?*J1E6e4W5[,{
A. had gone2A'p/\*A/?*J1E6e4W5[,{
B. had set off2A'p/\*A/?*J1E6e4W5[,{
C. had left2A'p/\*A/?*J1E6e4W5[,{
D. had been away2A'p/\*A/?*J1E6e4W5[,{