He’s read this book before, _____?
--I like to sing_______music. --Really? But I like music that I can dance______.
He _______ for two years. We are still sad about his _______.
I feel it hard to keep up with my classmates. But whenever I want to _______, my teacher always encourages me to work harder.
You can’t pass the exam ______ you study harder.
The basketball isn’t _____. It belongs to _________.