问题
单项选择题
It has been estimated that the earth's surface temperature has increased one quarter to three quarters of a degree since 1805.
A．to
B．by
C．at
D．with
答案
参考答案：B
解析：增加或降低/减少了多少用介词by，增加到或降低/减少到多少用介词to，考生一定要区分清楚。类似用法的词还有：decrease，fall，drop，reduce，rise等。题句意为：“据估计，自从1805年以来地球表面的温度已经增加了0.25度到0.75度。”