---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 |
We _________ some money every month in order to buy a computer.
| A.set out | B.set up | C.set aside | D.set about |
I soon found that the work I was doing had already been done by someone else. _______, I was wasting my time.
| A.In other words | B.In a word | C.As a result | D.In addition |
Many friends sent me e-mail to ________ me on the birth of my son.
| A.celebrate | B.reward | C.express | D.congratulate |
Many people ________ the accident, so it was not difficult to investigate(调查).
| A.witnessed | B.yelled | C.annoyed | D.envied |
It was along the Mississippi River _________ Mark Twain spent much of his childhood.
| A.how | B.which | C.that | D.where |