_____ this afternoon, you would have to come again next week.
| A．The boss were not to return | B．The boss didn’t return |
| C．Didn’t the boss return | D．Were the boss not to return |
I guess you could say that I am “one in a million”______, there are not many people like me.
| A．In a word | B．In other words | C．What’s more | D．Believe it or not |
It came as _____ great shock to us that many people lost their lives in _____ latest earthquake in Northwest China’s Qinghai Province.
| A．a; a | B．a; the | C．/ ; the | D．the ; / |
----- Can you use chopsticks, John?
----- ________ . I once stayed in China for two years.
| A．No problem | B．It all depends |
| C．I’m sorry, but yes | D．You can forget it |
Since the Obama administration took office, the China—US relations ________ positive development thanks to joint efforts of both sides, President Hu said at the Nuclear Security Summit in Washington, April,12,2010.
| A．witnessed | B．were witnessed | C．had witnessed | D．have witnessed |
.The other day I was showing the boys the weekly chemistry experiment when, ________ I knew it, the mixture was bubbling over everywhere.
| A．if | B．before | C．though | D．unless |