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[单选题]
The reason for his high GPA is _______ he studied very hard.(1分)
A
that
B
why
C
because
D
for
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参考答案
试题答案：
A
答案解释：
解题思路： 本题考查表语从句的用法。根据题意“他平均学分很高的原因是他学习很努力”。that为连词，引导的从句在主句中作表语用。正确答案为A）选项。
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