—What you can do is _______ more English if you want to learn English well.—You mean _______ more English is useful to me?
--- _____ can people communicate with each other if they can’t speak? --- By using _____.
--- Do you hear someone _____ on the door? --- Yes. It is late at night. Who can _____ be?
Disney research center creates _____ unusual robot which can draw pictures on the beach. _____ robot is 60 cm long and 40cm high.
. —He hasn’t told me when he the ticket.—Don’t worry. He will give it to you when he it.
Newspapers much useful information every day. When you arrive at a new place, buy a newspaper first.