—We have a tight schedule, so you mustn't __________ staring at the ceiling. —No, I won't.
The number of students applying for this position __________ 320.
We offered these students a summer course, aimed __________ improving their spoken English.
__________ to go to university, we must work hard.
The explorers were told to __________ themselves with everything they would need for the voyage.
The old teacher lay wide awake on his bed, __________ all the problems he had to deal with the next day.