Seeing the car trapped in the snow drift, the driver didn’t know ______ it

What’s that noise—There’s a truck stopping outside. It’s someone _____ something.

_____ useful advice she gave you! Youshould listen to her.

Listen! Helen is singing in the next room.– It be Helen. She has gone to Guangzhou.

Are there any English story books for us students in the library? — There are only a few, ______. [ ]