题目内容
Barrack Obama __________ President of the United States since 2010.
| A．became a | B．has become a | C．has turned | D．has been |
D
解析试题分析：Barrack Obama自从2010年一直是美国的总统。和since 2010连用，用现在完成时，而且因为是一段时间，所以不能和短暂动词become连用，所以选D。
考点：考查时态和动词
—Why do you charge me so much for such a simple meal! I wonder if you got mistaken.
—Oh, I have _______ in your bill the cost of the expensive plate you broke just now.
| A．released | B．included | C．contained | D．covered |
Dark clouds _______ the sunlight. It seemed as if it was going to rain.
| A．left out | B．picked out | C．blocked out | D．put out |
I didn’t mean to keep you waiting here for a long time. There are several traffic jams on the way. Can you ____ me?
| A．apologize | B．interrupt | C．forgive | D．behave |
This is not a typical summer camp, but Michelle is glad she _______ it.
| A．came down with | B．signed up for | C．got away from | D．did away with |
I have to see the doctor this afternoon because I ____ a lot lately.
| A．have been coughing | B．had coughed | C．coughed | D．cough |
We are all ____________ in books these days since the exams are coming.
| A．caught | B．missed | C． stuck | D．buried |
—Car prices have been going down sharply in the last 20 years.
—It's not surprising because the law of market ________ the price of a product.
| A．is controlling | B．controls |
| C．has controlled | D．controlled |
—Look, I've got admission to Harvard University for a shortterm study next semester.
—How fantastic! You ________ a different university life then.
| A．have experienced | B．will be experiencing |
| C．have been experiencing | D．will have experienced |