单选题With age, the mineral content of human bones decreases, _____ them more fragile.AmakeBand to makeCthereby makingDwhich it makes
单选题
With age, the mineral content of human bones decreases, _____ them more fragile.
A
make
B
and to make
C
thereby making
D
which it makes
参考解析
解析：
句意：随着衰老，人类骨骼中矿物质的含量会逐渐减少，因此骨骼会变得越来越脆弱。句中的decreases是谓语动词，其他动词只能以非谓语形式出现或出现在从句中，现在分词making及之后的部分作状语，表示结果。D项假如没有it也正确。
句意：随着衰老，人类骨骼中矿物质的含量会逐渐减少，因此骨骼会变得越来越脆弱。句中的decreases是谓语动词，其他动词只能以非谓语形式出现或出现在从句中，现在分词making及之后的部分作状语，表示结果。D项假如没有it也正确。
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