When a customer withdraws money from the bank, it is required to leave his signature. But how can we be sure it is_______?

Football fans are always arguing over those ____ goals in the World Cup．

I know these flowers are not natural, but the _____ ones look more beautiful and can last long.

 “What a pity! Two thirds of the apples I’ve just bought are ___.” He said.

The television is a _____ machine.