高中英语现在完成进行时单选题

--How can you keep slim as a mother of two?
--I have been _______ in the gym for years.

A．working out	B．carrying out
C．getting out	D．giving out

Minister Bill De Blasio     in office fewer than 48 hours when he came face to face with his biggest challenge in his life．

A．has been

B．had been

C．would be

D．is

I have to see the doctor this afternoon because I ____ a lot lately.

A．have been coughing

B．had coughed

C．coughed

D．cough

Kate  ________    on her new novel, which is supposed to come out next month.

A．was working	B．had worked
C．will be working	D．has been working

It's said that they ________ a better life ever since they moved to the US.

A．had enjoyed	B．have been enjoying
C．were enjoying	D．would enjoy

Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company  .

A．worked

B．has been working

C．is working

D．works

—I'm sure Andrew will win the first prize in the final.
—I think so.He ________ for it for months.

A．is preparing	B．was preparing
C．had been preparing	D．has been preparing

—Why，Jack，you look so tired!
—Well，I ________ the house and I must finish the work tomorrow.

A．was painting	B．will be painting
C．have painted	D．have been painting

Tom ________ in the library every night over the last three months.(2011·北京)

A．works	B．worked
C．has been working	D．had been working