—Sorry，Mum, I lost my key to the bicycle again．
—Oh! How_____ you be so careless! You have to learn to look after your belongings．
| A．can | B．may | C．will | D．dare |
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 11thSept in 2001，
| A．should；will be | B．were to；could |
| C．were；should have | D．should；would |