Don’t waste your time in your holiday. Try to find _______ useful to do.
Is it important ________us __________ learn English well?
I don’t know when Kitty ___________ tomorrow, and please give this message to her when she _________________.
I can’t decide _____.
Don’t worry _____, or you’ll get _____ thin.
It is very kind ____ you to help me with my lessons. It is hard ____ me to learn them well.