_________the fact that his first experiments had failed, ProfSmith persisted in his research

I can’t wait ____ the present box.

If you hurry up, I think it quitethat you’ll catch the flight[ ]

It knowledge is power, Sir Francis Bacon wrote in 1579, perhaps creativity ca be described as the ability to use that power

A number of graduates prefer to work in big cities , where there are lots of _______, like convenient transportation , more opportunities and better environment.