二、单项填空(本节有10小题,每小题1分,共10分)21. Many people agree that ______ knowledge of English is a must in ______ international trade today.
The old couple decided to _____ in the mountain village since it was so quiet and the air there was fresh as well.
According to a recent research, the number of people who take the adult college entrance examination is _____ reducing.
Some patients would rather pay more for more _____ and comfortable treatment in hospital.
People in the earthquake-stricken area were grateful for the _____ contribution which was offered by the people from all over the country.
The book tells a story of a woman in Afghanistan who was struggling to be good but forced to invent a / an _____ to protect her interests.