—Do you know _______he came?
—I am not sure.  Maybe for the toy car.

I didn’t know I was spelling a word or even ____ words existed.

He cannot hide his feelings, except ____ the writers ask if everything is all right.

This book will show the readers ______ can be used in other contexts.

We don’t doubt______ he can do a good job of it.

—Do you know _____ that Mr. White left the party without saying a word last night?
—Perhaps because he was angry with Alan’s rude remarks.

If you are unable to attend the interview, for _____ reason, you should inform us immediately.

—Why did he say so?
—Sorry, I don’t understand        he has said means.

As many as five courses are provided, and you are free to choose _____ suits you best.

People just wonder ________ that makes the housing price so high.