Why do you look so upset?— ________, I had to take over his work.

It ____ that all the students were having lessons in the teaching buildings when the earthquake occurred.[ ]

The old bridge,________300 years ago,was washed away by a heavy flood last summer[ ]

It was the dream of becoming rich _____ attracted people from all over the world to the state, ______ gold was discovered in 1848

.Although he’s eaten up two bowls of rice, he still doesn’t fell .