“What’s your opinion on the matter, please?” “Oh, sorry, I _______.”

It took _______ building supplies to construct these energy-saving houses. It took brains, too.

This is the very information _______ we can learn what is selling best in the market. .

We have to put up with her behaviour.

Do you know when Jim _________ —I don’t know. As soon as he , I will call you.