Looming over the debate about human interference in the world’s boreal forests is an as yet unanswerable question: Will the effects of global warming eventually dwarf man’s impact?
A、raise to greater importance
B、make more difficult to measure
C、cause to appear small
D、bring to an abrupt end
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试题解析
本题后面一句意为:全球变暖的后果会最终使人类的影响力变小吗?dwarf(使)变矮小。cause to appear small“使……看起来小”与之相符。raise to greater importance重要性上升。make more difficult to measure使……更难衡量。bring to an abrupt end草草收场。