Not until ________a third time ________that he had given birth to the reading system for the blind called Braille.
A．Louis Braille tried; he announced
B．did Louis Braille try; he announced
C．Louis Braille had tried; did he announce
D．had Louis Braille tried; had he announced
________ much media attention is paid to the topic of raising children or caring for elderly parents in their final years, it seems ________ not much is explained on being a parent.
A．While; that B．As; like
C．Because; that D．Since; /
---I heard your husband had left for Vienna by air．Why didn’t you go there with him?
---I_________．But I________ a fashion design competition two days away．
A．was scheduled to; will have attended
B．had been scheduled to; will be attending
C．was scheduled to have; am attending
D．had scheduled to; am attending
When ________how a statue from distant Greece, in China, researchers explained that it was no doubt a result of Alexander the Great’s influence．
A．they were asked; should appear;
B．being asked; can have appeared;
C．asked; must have appeared;
D．asked; could have appeared;
Hackers threatened _______ Sony release the film ‘The Interview’ （also entitled ‘Killing Kim jong un’）on the coming 2014 Christmas, they ______ launch terror attacks resembling 11th Sept in 2001,
A．should; will be B．were to; could
C．were; should have D．should; would
The “new” Japanese prime Minister Shinzo Abe wants the USA to promise _________ Japan declares war against China, the USA will give military aid, __________ promises to be impossible.
A．if; which B．whether; it
C．if; that D．when; it
