问题
单项选择题
—She was late for the party.
—That's () she had forgotten the exact time.
A. why
B. how
C. because
D. whether
答案
参考答案：C
解析：
由上下文得知，此句用于说明她迟到的原因。此处为because引导的表语从句，because意为“因为”。故选C。
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