当你向别人打听某事时，你应该说：________。

Mum,_______ of the apples ______ gone bad.—- We’d better eat up the as soon as possible.

The dictionary is ________ to my translation, but that one is ________.

Was it by cutting down staff ____ are not diligent eough _ _she saved the firm? —– No, it was by improving work efficiency.

Now the air in our city is ________than it used to be．Something must be done to stop it．