Can you ________ my dog when I go to America?
—Listen ! Helen is singing in the next room.It ____ be Helen. She has gone to Beijing.
-The presidents of China and the USA had ________ interview a short time ago.—And it was ________ great success.
— What's wrong with your uncle?— We're sure _______ something is wrong with him, but we doubt _______ the disease can kill him.
Did your father tell you _______?
Nowadays, more and more people would rather ____ __ in the country, because there is ______pollution there than in the city.