301.in possession（擁有）
302.in practice（實際上）
= virtually
= actually
303.in pursuit of（追求；追尋）
= in quest of
= in search of
= pursuein the act of（在…當場；正當…）
（註）：catch sb red-handed（當場逮捕）
304.inquire after（問候）
= ask after
（註）：inquire into（調查）
= investigate
= look into
305.insist on（堅持）
= persist in
306.in session（正在開會；上課；開庭等）
307.in one's way（妨礙某人）
= in the wayin vain（徒勞無功地）
= to no purpose
= fruitless
= futilein view of（鑑於由…觀之）
308.It’s the early bird that catches the worm.（捷足先登；先下手為強）
309.be jealous of（對…嫉妒）
= be envious of
310.jump to a conclusion（遽下結論）
311.keep abreast of（與…並駕齊驅；不落伍）
= keep up with
= keep pace with
= keep abreast with
312.keep an eye on（看守；注意）
313.keep one's head（保持鎮定）
= keep coolkeep good time（鐘錶）走得準
（註）：
(1) make good time（用高速度的交通工具去旅行）
(2) keep good hours（早睡早起）
= keep early hours
(3) keep bad hours（晚睡晚起）
= keep late hourskeep track of（記載；追蹤）
314.keep up（保持；繼續）
315.kill time（消磨時間）
316.kill two birds with one stone（一石二鳥；一舉兩得）
317.keep sb at arm's length（保持距離）
= keep sb at a distance
318.keep body and soul together（維持生存）
319.kind of + adj. (adv.)（有幾分）
= sort of
= somewhat
320.keep one's head above water（免於負債）