Write the sentence in the singular.
例句：
These sweaters are pretty.-------- This sweater is pretty.
Those purese are expensive.-------- ____________________.
Are these your neighbors?-------- ____________________.
Are those your dresses?-------- ____________________.
Those are Bill's shirts.-------- ___________________.
These women are my friends.-------- ____________________.
These aren't my gloves.-------- ____________________.
Those are her cats.-------- _____________________.