The boy is old enough to ---------himself.
--What's wrong with you, Dave?--My homework can't be on time because I've left it at home.
--Susan's parents have bought -a large house with a swimming pool in Paris.--It be very expensive.
-- is it from Beijing to your hometown?--More than 30,000 miles.
The little boy pretended when his mother came in .
Eric's never seen a 3D movie at the cinema , .?