's no use waiting for him any longer. We ________ as well go without him.

He ________ out of the window for a moment and then went on working.

You should always keep receipts from shops as proof ________ purchase.

Please don't mention it ________ my husband, but I paid $10 for this hat.

I knocked ________ the door.

You must have ________ the examination before Friday, so bring your money to the office as soon as possible.

They ________ for you for more than two hours now.

I would have come home earlier if you ________ me to help you with the housework.

Petrol in this country is so expensive ________ we use public transport as much as possible.

There has been some ________ in the relations between those two countries recently.