He was about to jump into the river ________ his mother stopped him[ ]

More TV programs,according to government officials, will be produced ________ people’s concernover food safety. [ ]

9．You_______if you had spoken the truth out. But you were as quiet as a mouse.

Two years ago, three scientists traveled to the Antarctica to explore a secret world hidden _________ the ice

Do you mind my opening the window—-______I feel a bit cold.