2. 职称英语
  3. Not until the early years of the 19th century _________ what heat is.A、man did k

Not until the early years of the 19th century _________ what heat is.A、man did k

游客2023-10-16  51
问题 Not until the early years of the 19th century _________ what heat is.
选项 A、man did know
B、man know
C、didn’t man know
D、did man know
答案 D
解析 本题为倒装句题。看到Not until…的的型,我们知道为倒装句,答案在C项和D项中选一个。改写为正常语序为“Man did not know what heat is until the early years of the 19th.”。现在将not提前，后面就不能再用否定了,否则意思就变了，故排除C项。句意:直到19世纪初，人们才知道什么是温度,故选D。
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