He had to speak in a loud voice in order to make himself_________.

_______hard work it is! And __________should I do to complete it well

been living in the United Statesfor twenty years, but seldom_______ so lonely as now

He is too old to run_____ to catch up withthe young boy.

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