______ was known to us all that Johnson had broken his promise _____ he would give each of us a small gift.
---Jack, what do you think of the event which not only promoted ______of the world hunger, but raised a lot of money to help those poor children? ---That’s great.
---How often do you eat out? ---________, but usually once a week.
The trouble is ________we are short of hands.
She wanted to know ________.
No one knows when and where________.