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 doubta 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 attacksresembling 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
