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题目
题型:不详难度:来源:
When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
A.thatB.itC.thisD.what

答案
B
解析
考查固定句型:when it comes to“当涉及…的时候”,句意是:当涉及研究心脏病和它对身体的影响时,我们不会有适当的代用品来代替动物。选B。
核心考点
试题【When ______ comes to research into heart disease and its effects on the body, we】;主要考察你对句式等知识点的理解。[详细]
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