Wow, so many books here! How can you find the one I need? —Yhat’s easy．The books are _____ by subject．

What were you doing when you __________ strange noise—Well, I __________ with my little sister.

It is __________ that everyone in thecountry likes to play it

Whenever she heard that someone had trouble, she would go to ________.[ ]

Would you mind ____ here Sorry, I won’t.