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单选题
The Second World War （） millions of people were killed ended in 1945.
A
on which
B
where
C
in that
D
during which
答案解析
正确答案：D
解析：
题目解析
The Second World War (） millions of people were killed ended in 1945.
选项D: during which
解析: 这个题目考察的是定语从句的用法。句子中的"during which"引导了一个修饰"Second World War"的定语从句，指代时间，表示"在其中"，修饰整个句子的时间范围，符合句意。
