单选题
Our staff members spent the busy summer responding to customers ______ vehicle failed because of the hot weather.
A、
its
B、
that
C、
which
D、
whose
【正确答案】
D
【答案解析】
[解析] 语法:关系代词
1.空格后接名词,关系代词whose可充当其所有格。因此D为正确选项。
2.A选项是所有格,但没有连词功能,因此排除。
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