—It’s 9 o’clock now. I must go.—It’s raining outside. Don’t leave ________it stops.
.We often hear him ______ the piano in the afternoon.
.I don’t remember _______ the book yesterday.
_______ useful information it is!
She is a _______ girl and she always says to her teachers _______.
.The math problem is _______ hard for me ______ work out.