Our teacher told us light (光) _________ much faster than sound .

Your cat looks lovely. I also want to keep ___________.

I am so hot. Can I sit _______ the window? [ ]

What would you do if _________ eighty-year-old man fell down in front of you? —-I don’t know. Maybe I will help him.

Thank you very much. —Not at all , I was____________ glad to help.