It was not until 1945, ___ the Second World War came to an end, ____ people began to realize the eventual coming of peace.

The look on his face showed that he had enough confidence in himself.

The flu is believed _____ by viruses that like to reproduce in the cells inside the human nose and throat.

__________ is troubling me is __________ I don’t understand __________ he said.

________.If you keep practicing speaking English every day, you’ll be better at it.