Contrast may make something appear more beautiful than it is when ______ alone.having been seen seen to be seenbeing seen 选seen能说明下别的几个为什么不选吗,如果选又将把句子进行什么改动,请举例,

May I trouble you____(not make)so much noise Contrast may make sth appear more beautiful than it's when _____ about.A.seen B.to be seen C.in seen D.having been seen Contrast may make something appear more beautiful than it is when ______ alone.A seenB is seenC to be seenD having been seen Everyone may make mistakes sometimes,so don't l_____ at others who make mistakes. contrast may make something appear more beautiful than it is when ____aloneAhaving been seen Bseen Cto be seenDbeing seen 这个句子的从句主语是it,但我的问题是这个句子主句的主语是contrast还是something?如果是contrast是主 Please complete the following sentences according to what has been given.1．_________________________（直到他完成使命）did he realize that he was seriously ill.2.Contrast may make something appear _____________ (比单独看时更漂亮).3. ____you make so much noise?Sorry,I'll take care not to Must; Can.May; Would Kate does her homework carefully so that she may make few mistakes.(同义句转换） Everyone may make mistakes sometimes so don't ( )at others who ake mistakes Dogs may make the grass dirty ,so there's a sign here:____dogs! you may make an appointment with the teacher,as he or she is so busy.you may make an appointment with the teacher,as he or she is so busy.这里as怎么翻译 ___you make so much noise?Sorry.I'll take care not toa.Must b.Can c.May d.Would 把Ten government wants to make the air cleaner so it may stop people from using their stoves 翻译成 In fact you may find the experienceIn fact you may find the experience so enjoyable that you wil volunteer to make more sp-eeches! 英语翻译you must improve your method __you may make progress in your studiesA so ao to B in order C so D in order that May I Make Love With you make me so you make me so