Historically, ________ main material for making tables has been wood, but ________ metal and stone have also been used.
The ground is wet all over, so I’m sure it must have rained last night, ________?
________ is know to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
It was Mr Zhang that helped us out of the trouble. Without his help, we ______ it so easily.
With all the money ________, the man had to make a living by begging.
Having studied in America for three years, the young man didn’t change much, ________ a bit fatter.