The police found that the house____and a lot ofthings___.[ ]

Do you know that China is one of ________countries in the world—Yes, I do. It’s much ______than the US.

Chengdu has _______traffic that all the schools in it had a day off on the first day of the Western China International Economy and Trade Fair (西博会)to avoid traffic jams.

It is the prevention of disease_____ itssuccessful treatment that has led to the rapid increase of the world’spopulation

Accustomed to ______ the steepmountain, he had no difficulty reaching the top.