She looks unhappy recently ._________her demand has been turned down by her parents.A、thatB、whyC、becauseD、because of请说明理由.

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She looks unhappy recently ._________her demand has been turned down by her parents.
A、that
B、why
C、because
D、because of
请说明理由.

C 中B大写

c

c原因状语从句
d,because of是副词,不能用

题目有误,无正确答案。前句以句号结尾,选项首字母应大写。