All her energies are ______upon children and she seems to have little time for anything else.

He tried hard to keep calm in face of the policemen, but the sweat on his forehead _________.

My headmaster usually ___his speech with a funny joke .

The agreement indicates that the two companies will _____ with each other again.

 Darkness _____, so we had to stop our journey and stayed on a farm for the night.