---Are Mr. and Mrs. Wang living alone in the house? ---Yes, they have three sons, but ______ of them live in their own houses.
--How many cars _______in the factory every month? --About 2000.
Two ______are talking with two_______ in English.
--Body language can pass message. In China ,_____heads often means agreement.
The doctors have done everything they can______ the patient’s life.
.--Look, there are ______number of ducks swimming in the river. --Yes. ______number of them is over ten.