Before joining the Department of Defense, Mr． Panetta _______ as director of the CIA from February 2009 to June 2011．
| A．would serve | B．served | C．was served | D．had been served |
I don't think you can work out the maths problem ____ the teacher's help.
| A．since | B．unless | C．because | D．without |
My uncle lives ____ 105 Huanghe Street. His room is ____ the fifth floor.
| A．at;on | B．at;at | C．on;in | D．of;to |
My father was disappointed ____ the news.
| A．by | B．about | C．at | D．on |
His teacher was angry ____ him ____ his being late.
| A．at,with | B．at,for | C．with,for | D．with,about |
She felt disappointed when she found out they had gone swimming____ her.
| A．but | B．except | C．except for | D．without |