求助GWD里面的一道语法题

xuhui1993

Discussion of greenhouse effects has usually focused on whether the earth would warm and by how much, but climatologists have indicated all along that the most obvious effects, and those that would have the largest impact on people, would be extremes of temperature, precipitation, and storminess.

• Athe most obvious effects, and those that would have the largest impact on people, would be extremes of temperature, precipitation, and storminess  
• Bthe effects that are the most obvious ones, extremes of temperature, precipitation, and storminess, would be those impacting the most on people  
• Cthose effects to have the largest impact on people, extremes of temperature, precipitation, and storminess, are what are the most obvious effects  
• Dextremes of temperature, precipitation, and storminess, the most obvious effects, that they would have the largest impact on people  
• Eextremes of temperature, precipitation, and storminess, which are the most obvious effects, are those to impact the most on people  
  

正确答案是A，我选了C，看不懂all along that充当了什么成分，求大神帮忙解答啊！

brfmzbjz

all along 做verb modifier 修饰indicate
拿掉不影响选题

xuhui1993

brfmzbjz 发表于 2014-8-7 17:11
all along 做verb modifier 修饰indicate
拿掉不影响选题

瞬间结构清晰了，谢谢啦！