Ⅰ.单项填空
1.Global warming ________ an average increase in the Earth’s temperature that， in turn， leads to climate change.
A. appeals to B. occurs to
C. refers to D. belongs to
答案 C
解析 考查动词短语辨析。句意：全球变暖指的是地球平均温度增长，继而导致气候变化。appeal to“吸引”； occur to“想起”； refer to“提到；意指”； belong to“属于”。
2. Reduced rainfall has affected large areas of Africa for years， ________ irrigation canals dry and many other zones are becoming drier.
A. leaving B. to leave
C. left D. having left
答案 A
解析 考查非谓语动词。句意：多年来减少的降雨影响了非洲的大片地区，使得灌溉渠干涸，许多其他地区则更加干旱。leaving ...是现在分词短语作结果状语。
3. A number of nations have already been in armed conflict over water， and reduced rainfall
