29 Can you say _____ certain when he willcome here

It’s hard to avoid mistakes_____ we realize our mistakes and do our best to correct them, that’s all right

I didn’t want to _________ my best friend at all.

If I can’t finish _______my homework now, I’ll go on with it after supper.

The news came, as expected, __________ my cousin was chosen to be a foreign aid doctor to go to Africa where people are suffering a lot from aids.