问题补充:
Sarah decides to move to Hainan because she thinks that the air there is much fresher than here.
A. one
B. those
C. ones
D. that
答案:
A. one
B. those
C. ones
(答案→)D. that
解析:考查代词用法。One指代可数名词单数,表泛指;ones指代可数名词复数,表泛指;that指代不可数名词或者可数名词单数,后面必须有定语修饰,是特指;those指代可数名词复数,是特指。句意:Sarah决定搬去海南,因为她认为那里的空气要比这里的空气新鲜得多。