Millie is ________ of the dark. She never goes out at night.
---Do you know sound travels very fast?----Yes. But light travels _______ sound.
Paper-making is one of _______ of ancient China.
Could you please give some _______ to the _______ teachers?
Please wait here. I’ll be back in _______ hours.
----Have you found your lost mobile phone?----No, I haven’t found _______. I have to buy a new _______.