The big fire in Shanghai, believed to ________ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there.
Johnson had made up his mind to give it up,but on________ second thought he determined to try________ third time.
He left a good impression on me________ I saw him.
—Where did you find the wallet? —It was at the stadium________ I played football.
The moment she came back from work,she________ to clean the kitchen thoroughly.
I wanted to have a word with her,but she________ me and went away.