--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 |
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