Stephen Hawking has expressed his opinion ___ humans might one day be able to make spaceships capable of such speeds that time on board would slow down.
Here are the first three books of his poem works, with the fourth one to _____ next month.
_______every member has arrived, let’s set about _____ the plan for the next five years.
His classmates offered him their congratulations ______ his successful performance.
______ in a well-known university is what everybody wishes for.
I could _______ by the way she walked that her knee was still bothering her.