He is a student at Oxford University, __________ for a degree in computer science.

[　　]

I smell something _________ in the kitchen. Can I call you back in a minute?

[　　]

--Lucy doesn’t mind lending you her dictionary.

--She _________, I’ve already borrowed one.

[　　]

He got well-prepared for the job interview, for he couldn’t risk _________ the good opportunity.

[　　]

A communicative satellite ________ as much as 3.5 tons was sent up into space last week.

[　　]

_________ out of work for a few months, Mum took up the job of waiting on patients in hospitals.

[　　]

________ more effectively with others, more and more people equip themselves with a higher education.

[　　]

Young man, if you hurry up, I think _________ quite ________ that you will catch the next train.

[　　]

When _________ questions in class, one should answer them as clearly as possible.

[　　]

--Where are you, Mary?

--Here in the study, ________ to my pen friend in Beijing.

[　　]