－Did you talk back to your mother when you were a child－Yes. But now I realize I was wrong. I really regret _____ that silly thing to my mum.

Frank put the medicine in a top drawer to makesure it would not be __________ to the children.

The sports meeting we have been looking forward to ___________ finally.

Some robots are ______ to do the same things ______ people.

The number of people invited ______ fifty, but a number of them ______absent for different reasons