—Would you like to go and watch a tennis match this weekend with us?
—I'm sorry, but I've got ________ plans.
| A．other | B．another | C．some | D．more |
After three years of hard work, they at last _____ all the money they had borrowed.
| A．paid off | B．paid back | C．paid in | D．paid for |
---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 |
The operation room in every hospital has to _______bacteria of any kind so that the patient being operated on doesn’t get infected.
| A．keep free from | B．make it free from | C．to be made free with | D．be kept free from |
The father has been ____ for many years in order that his only son can be ____ with higher education.
| A．fighting; served | B．struggling; equipped |
| C．working; offered | D．laboring; received |
People often make a mistake about my nationality. I was born of Chinese parents , _____, I look ______ but I was born and grew up in America, so I am an American.
| A．however; Chinese | B．therefore; Chinese |
| C．so; the Chinese | D．therefore; a Chinese |