Tens years ago, there _____ full of fish in the lake .Now there are _____ fish .
-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.
Dr. Ma is strict ______ local doctors and nurses, especially________their skills.