题目内容：
3. At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly ________ to another subject. A、 switched
B、 committed
C、 favored
D、 transmitted
参考答案：
选择题：3.At first, the speaker was referring to the probl
- 题目分类：大学英语
- 题目类型：选择题
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A、 switched
B、 committed
C、 favored
D、 transmitted