---I don’t know how to write the article assigned by our professor on international trade.
--You should have ______ your attention on the lecture that ______ how international situation affects exports and imports across the globe.
| A．put; concentrate on | B．paid; talked about |
| C．fixed; dealt on | D．focused; focused on |
—Can I sit in your new sofa? It looks so nice.
—______. I will get some coffee for you.
| A．Make yourself comfortable | B．Take it easy |
| C．Help yourself | D．It’s a pleasure |
From ______ you are standing, you can have a bird’s view of the whole city and feel its great changes during the past decades.
| A．what | B．when |
| C．which | D．where |
—Did you hear that Jack used to be a policeman for two years?
—You’re kidding! He ______, for he’s too short.
| A．can’t be | B．can’t have been |
| C．may not be | D．may not have been |
Look! A group of students are playing the violin there, _____ their teacher as a conductor.
| A．in front of them stand | B．in front of whom stands |
| C．in front of whom stand | D．in front of them stands |
How many men does your unclefor him?
| A．have worked | B．have to work |
| C．have been worked | D．have working |