in formal occasion还是on formal occasion?

in formal occasion还是on formal occasion? Formal occasion是什么意思? 1.I have no formal clothes for this occasion; perhaps I can ________ in a dark suit.（get I hate formal occasion like wedding___you have to put on a jacket and tie中的引导词该用when还是wher on _____ occasion = in this situation?空格里填什么?还是不填? occasion formal FORMAL php bug :$a='fr/formal-special-occasion-dresses/p/3'; echo ltrim($a,'fr/');结果是：ormal-special-occasion-dresses/p/3；为什么? in honor of the occasion是什么意思啊. Join in the fun on occasion是什么意思 Slang words or expressions are ___A informal languageB formal languageC formal and in formal languageD written language “在任何场合”用英语怎么说……到底是on any occasion，还是at还是in？有没有谁特别肯定的！ 在一些场合应该是in/on some occasion? occasion用什么关系词连接?where 还是 when? somenoe introduces you to a stranger in a formal situation. FORMAL的比较级是直接加ER还是MORE~ I tried to choose something in keeping with the occasion.只翻译in keeping with