Is that your best friend Kitty – No, it _________ be her. She flew toSingapore yesterday.

I don’t think this TV set is ofgood quality. Can you replace it with a new one— ___________. But I have to talk to mymanager first.

If it isn’t him, who________ it be?

Notuntil they left school ______ how much their teachers loved them and helpedthem

The old lady is so weak. She________by her relatives.