bouquet :「花束」, How soon = When, How come = Why,
Did you submit the proposal by the due date? :「期日までに提案書を提出しましたか?」,
said to you, explain to you, facilitate :「促進する」, commence :「始める」, in duplicate :「正副2通ずつ」,
readily :「簡単に」, prospective :「見込まれる」 e.g. a prospective buyer, applicable :「適切な」,
mandatory :「義務」, approve of ~ :「~を認める」, interfere with ~ :「~に干渉する」,
repond to ~ :「~に応答する」