The government has to close those small factories to prevent the water of the river ______.
Look, dark clouds are gathering. It is________ to rain soon.
As is known to us all, English books of this kind ______ well in middle schools.
I have finished a large part of the book; the rest ______ more difficult.
I’ll _______ the matter as soon as possible. Just have a little patience.
Whoever comes here to have the meeting will be treated ________ a wonderful dinner.