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When in trouble, many teenagers go to their friends             for advice.
A．to askB．a(chǎn)skingC．a(chǎn)skD．a(chǎn)sked
A

試題分析：句意：當(dāng)有困難的時候，很多年輕人去找朋友征求建議。這里用不定式做目的狀語，所以選A。
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