Mozart started writing music ______________ he was four years old.A until B after C before D when
The _________ joke often makes the children.
— _____________ does your cat weigh? — About 5 kilograms.
He is _________ of the three.
Miss Gu is _____ teacher. She teaches ____ Chinese.
—_______your mother good at cooking?---Yes, but my father _____cook well.