题目

Allow children the space to voice their opinions, _______they are different from your own. A.until                  B.even if C.unless                D.as though 答案：B 解析: even if 引导让步状语从句，until引导时间状语从句， unless引导条件状语从句， as though引导方式状语从句。点评：该题是由高中英语第三册第14单元Integrating Skills里的句子“Their diet is also similar to ours—they eat meat and plants—even if they sometimes feast on things we may find disgusting,such as insects and ants.”演变来的下列属于放热反应的是A.铝和盐酸反应  B.焦碳和二氧化碳共热  C.石灰石的分解    D.氢气还原氧化铜