题目内容：
1.Studies have shown _______ teenagers often suffer form depression.A.that B.which C.in which D.in that
参考答案：
选择题：1.Studies have shown _______ teenagers often suffe
- 题目分类：武汉科技大学 大学英语（三）
- 题目类型：选择题
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A.that B.which C.in which D.in that