With all his attention ____ on the computer game, the boy even didn't notice his mother came in.
Thank you very much. Without your help, I _______the exams.
We have already placed an order ____ that company _____ the machines.
He is _____ an American as an apple pie.
We all look forward ____ your beautiful country.
._______, I cannot accept your invitation. Hopefully, we’ll get together some time next year.