At the start of a cross-subject（语境补充词）/cross-subject/ challenge, Noah's team received a real case rather than a textbook（教科书）/'tekstbuk/ exercise. The opening evidence connected familiar（熟友、常客）/fә'miljә/, fancy（想象力、幻想）/'fænsi/, fantasy（幻想、想象的产物）/'fæntәsi/, fashion（流行、风尚）/'fæʃәn/, favour（好感、偏爱）/'feivә/, feature（特点；以……为特色）/ˈfiʧər/, fellow（男人、朋友）/'felәu/, female（女性、女人）/'fi:meil/, fence（围墙、栅栏）/fens/, fetch（取来）/fɛʧ/, fibre（纤维）/'faibә/, fiction（小说、虚构故事）/'fikʃәn/, figure（数字；图表）/ˈfɪgjər/, and file（文件）/faɪl/. The links looked unusual, but each detail came from a witness, label, form, or measurement（尺寸、度量）/'meʒәdmәnt/ in the case file. The team has already reviewed the complete plan.
A second folder added financial（财务的）/ˌfaɪˈnænʃəl/, fist（拳头、手）/fist/, flash（闪光、闪现）/flæʃ/, flavour（味、调味香料）/'fleivә/, flood（洪水、大量之水）/flʌd/, flour（面粉、粉沫）/'flauә/, flow（流程、流动）/flәu/, flu（流感）/fluː/, fluent（流利的、流畅的）/'flu:әnt/, foggy（雾深的、模糊的）/'fɒgi/, fold（折层、折）/fәuld/, folk（人们、家人）/fәuk/, fond（喜欢的、宠爱的）/fɒnd/, and forehead（额）/'fɒ:rid/. Some entries described people and places; others recorded objects, actions, or changing conditions. The students sorted each clue by time and source instead of forcing an early answer. The final choice was explained to everyone at the meeting.
The hardest set included forever（永远）/fә'revә/, forgive（原谅、宽恕）/fә'giv/, formal（正式的、形式的）/'fɒ:mәl/, former（以前的）/ˈfɔrmər/, fortunately（幸运地、幸亏）/'fɒitʃәnitli/, forward（向前）/ˈfɔːwəd/, found（建立、创立）/faund/, foundation（基础、根据）/faun'deiʃәn/, fountain（水源、源）/'fauntin/, fox（狐狸）/fɑks/, frank（免费邮寄特权）/fræŋk/, freedom（自由）/ˈfridəm/, freeze（结冰；冻住）/friz/, and frequently（频繁、经常地）/'fri:kwәntli/. Noah checked spelling and context while a partner marked facts that could be tested. Mina, who led（lead的过去式和过去分词）/led/ the discussion（讨论）/dɪˈskʌʃn/, asked for clear evidence. Then the supervisor（管理者、监督者）/.sju:pә'vaizә/ said, 女“Do not hide an awkward clue merely because it weakens（削弱、减弱）/'wi:kәn/ your first idea.”
The last working board brought together friction（摩擦、摩擦治疗）/'frikʃәn/, frightened（受惊吓的、受惊的）/'frait(ә)nd/, frog（青蛙）/frɑg/, frontier（边界、边境）/'frʌntjә/, frost（霜、冰冻）/frɒst/, fry（油炸食物、鱼苗）/frai/, fuel（燃料、木炭）/'fjuәl/, fund（资金；基金）/fənd/, fundamental（基本原理、原则）/.fʌndә'mentәl/, further（进一步的）/ˈfərðər/, gain（获得；增加）/geɪn/, gallery（走廊、最高楼座）/'gælәri/, gap（缝隙、缺口）/gæp/, and garbage（垃圾、废物）/'gɑ:bidʒ/. The group compared the four boards, removed repeated claims, and wrote（写下）/roʊt/ a short reason beside every decision（决定）/dɪˈsɪʒn/. If the first method fails, we can try another one. That rule helped them correct two mistakes without blaming a teammate（队友）/'ti:mmeit/.
They planned to check in（办理登记手续）/ʧɛk ɪn/, check out（办理退房；结账离开）/ʧɛk aʊt/, and set off（出发）/sɛt ɔf/ at safe times. Nobody would go on board（在交通工具上）/ɔn bɔrd/ without checking the notice in advance（提前）/ɪn ədˈvæns/. In case of（万一；如果发生）/ɪn keɪs əv/ trouble, one adult would be responsible for（对……负责）/bi riˈspɑnsəbəl fər/ contact while the student could apply for（申请）/əˈplaɪ fər/ official help. The completed record told（告诉）/toʊld/ a clearer story than the first draft. It did not pretend that every clue was equally important; it showed how disciplined reading, calm cooperation（合作、协力）/kәu.ɒpә'reiʃәn/, and a checkable（语境补充词）/checkable/ decision could turn a crowded case into useful（有用的）/ˈjuːsfəl/ action.