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 |
It was not until all the milu deer ________ that we realized we should build a natural park to protect them.
|
A．died off |
B．died away |
C．died out |
D．died down |
Do you remember a certain occasion ________ you were in trouble and at that moment I gave you a hand.
|
A．when |
B．which |
C．why |
D．where |
No bread eaten by man is so sweet as ________ earned by his own labor.
|
A．one |
B．those |
C．it |
D．that |
Little__that the basketball he once played could be sold for 150,000 Yuan at the auction(拍卖).
|
A．Yao Ming expected |
B．Yao Ming had expected |
|
C．did Yao Ming expect |
D．had Yao Ming expected |
