Once upon a time,a(n)________famous scientist said that life was not easy for any of us but first of all we should believe in ourselves.
The old worker _______ a very practical plan at the meeting yesterday, but it was turned down by the manager.
— Were you caught in the heavy rain this morning? — Yes, I was. _______ had I left home than it began to rain dogs and cats.
As citizens of our country, it is our duty and responsibility to _______ the legal rights of our own in the election.
________, he knows a lot of things.
While watching television,__________.