题目内容：
What type of approach does the student apply to listening according to what he describes? __________"When I listen to English tapes, I am always worried about my limited vocabulary. I tend to figure out its actual meaning when coming across an unknown word, so that stop makes me miss the next part of the speech."
A.Detail-oriented approach
B.Top-down approach
C.Interactive approach
D.Bottom-up approach
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答案解析：