The professor held the crucible the Bunsen flame when heating the substance.
.---You have been on tour for a week in our city during May Day. What do you think about it?---Oh, what _______different Nanjing! It isn’t _______I saw last.
--- Could you put off the meeting?----________. This is the only day everyone is available.
. Mike had to walk home _______his bike stolen.
Everybody in our village, men and women, young and old, ______ the game.
We are living in an age ______ people broadcast the smallest details of their life.