问题
选择题
. It was great joy ________ he received the news that his lost daughter had been found.
A．because
B．which
C．since
D．that
答案
答案：D
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. It was great joy ________ he received the news that his lost daughter had been found.
A．because
B．which
C．since
D．that
答案：D
缺失，余留牙正常，患者习惯硬食及纤维含量高的食物