______ scientists know where a storm willhappen, winds will suddenly change, carrying the storm to a new direction.

It is a good habit of ______ to read something before going to bed.

Nowadays parents are so busy with their work that they have time to communicate with their children.

____ you how to deal with the matter, but whydidn’t you ask me

Did you ____ your homework—No, I didn’t ____ it this afternoon.