单选题 The age of other trees is variously estimated as ______ from two hundred to eight hundred years.
A. changing B. differing C. varying D. ranging

【正确答案】 D

【答案解析】change from...to...：由……变成……；differ from：与……不同；vary from...to………之间不同，如customs vary from country to country(各国有各国的习俗)；range from...to...：在……之间(有时表示对立的两个特点，如The attitude to this president ranges from great respect to intense resentment)。