Economy is booming, so it is hard for some of the firms to _____ enough labor , though their working conditions are rather good.

A friend is a person who knows what you are saying ______ you are not talking.

__to work overtime that evening, I missed awonderful film.

“On no account ____to feed the animals”, the warning can be seen on the signboard in front of every cage.

_______ will your father come back from Beijing — In two days.