The couple _________ last week, which surprised their friends and relatives greatly because they appeared that happy all the time.
The reason _______ he raised for being late with the exercise was ______he had to send his mother to school.
It is said _________ was how Chinese characters developed.
The coin was almost worthless. So it was of small ________.
She had hardly got back to the kitchen ________ the doorbell rang.
They discovered the cause of the fire accidentally. They discovered it _______.