you'd better -----the third paragraph of the composition ; I

try out 提炼,熬油,(采用前)严密试验; 筛矿; 量(金属的)纯度pick out 挑选；取出；了解；衬托come out1。出来；出现：例句:The stars came out as soon as it was dark。天一黑星星就出来了。2。开花；发芽：例句:Some flowers have begun to come out。有些花现在已经开始开花了。3。出版；发表：例句:That magazine comes out every Monday。那份杂志每星期一出版。4。透露,传出；公之于世；(真相)大白：例句:The truth has come out at last。真相终于大白。5。显出,显露,露出6。初次进入社交界；初次登台；初露锋芒7。结果是,结局：例句:How did the movie finally come out?这部电影最后的结局如何?7。考试结果…,考第…名：例句:She came out first in the examination。这次考试她考第一名。8。(照片)照得(好坏),洗出(清晰等)：例句:Everyone came out well in the wedding photograph except the bridegroom。在结婚照片中除了新郎以外人人照得都不错。9。(算术题)被算出,被解出：例句:Will you help me with this sum?It won't come out。你能帮助我算这道算术题吗?这道题算不出来。10。洗掉；褪色：例句:Ink stains don't usually come out。墨水的斑点一般都洗不掉。11。罢工：例句:The workers are coming out for more pay。工人们为了增加工资正在罢工。12。[俚语]公开搞同性恋爱,公开同性恋身份,公开宣称自己为同性恋者：例句:Why do gays have to come out at all?Why can't they just live their lives discreetly?为什么同性恋者要公开身份呢?为什么他们不能默默地过自己的生活呢?13。表明态度,提出主张：例句:Did he come out for the new regulations?他对新规章表态了吗leave outv。省去,遗漏,不考虑Leave out遗漏,省略leave undone or leave out。漏做某事或者遗漏了某事。To leave out; disregard。忽略不加注意；忽视To leave out; omit。漏掉；略去Please leave them out side。请把它放在外面。所以选 D