47. What does the author say boredom can lead to?
- A. Determination.
- B. Concentration.
- C. Mental deterioration.
- D. Harmful conduct.
答案：D
答案句：Boredom has been linked to behavior issues including inattentive driving, mindless snacking, excessive drinking, and addictive gambling.
参考译文：无聊与行为问题有关，包括注意力不集中的驾驶、无意识的吃零食、过度饮酒和成瘾性赌博。
定位线索：题干“boredom can lead to”对应答案句“Boredom has been linked to”；文中“behavior issues”对应选项D“Harmful conduct”。
解析：题干问无聊会导致什么。答案句明确指出无聊与行为问题相关，并列举了危险驾驶、暴饮暴食、赌博等有害行为，对应D。A、B、C均未提及，属于无中生有。
50. What does the author suggest one do when faced with a challenging problem?
- A. Stop idling and think big.
- B. Unlock one's smartphone.
- C. Look around oneself for stimulation.
- D. Allow oneself some time to be bored.
答案：D
答案句：In our always-connected world, boredom may be a hard-to-define state, but it is a fertile one. Watch paint dry or water boil, or at least put away your smartphone for a while, and you might unlock your next big idea.
参考译文：在我们永远互联的世界里，无聊可能是一种难以定义的状态，但它是一种富有成效的状态。看着油漆变干或水烧开，或者至少把智能手机放下一会儿，你可能会激发你的下一个好主意。
定位线索：题干“faced with a challenging problem”对应答案句“unlock your next big idea”；文中“put away your smartphone”和“watch paint dry”对应选项D“Allow oneself some time to be bored”。
解析：题干问面对挑战性问题时作者建议做什么。答案句建议放下手机，让自己无聊一会儿，从而激发好主意，对应D。A“停止闲逛”与原文相反；B“解锁手机”与原文相反；C“寻找刺激”未提及。