Every possible means ______ to prevent the air pollution, but the sky is still not clear.
The airplane _____late, for we didn’t see the famous pop singer until 10 pm.
The doctor suggested she ____in bed, while her smiling face suggested there ____nothing serious.
_____impressed the audience most was ____ the magician Liu Qian played in this year's Spring Gala.
Pointing to the house on ______ roof grew lots of bush, the old man told me that was ______ I would stay.
Choosing the right dictionary depends on ______ you want to use it for.