（who)pencil is on the desk?

（who)pencil is on the desk? who is your pencil box from who is your pencil box from 中文 who is on duty -------put it in your pencil case?A.who B.who-------put it in your pencil case?A.who B.who is C.where D.whose (teacher) Day is on September 10th The pencil box is on the bed改为一般疑问句 The tape is on the pencil box.改为同义句 A pen is on a pencil-box.【改为同义句】 there is a pencil sharpener on the desk改成疑问句 The pencil is long on the desk和The pencil on the desk is long有什么区别吗? the pencil on the desk is new 可不可以说成 the pencil on the table is new who is on duty today lily’s birthday is on september 15th画线提问【】【】is on september 15th？ Who know my heart,is th 要确切 将所给单词连成句子 watch her is where red book an English on bed my is Gina's who in room is ywatch her is where red book an English on bed my is Gina's who in room is your and are in pen the pencil box not pencilyour baseball under are the 改错：Christmas is on December 25th on winter. there are also those who believe that friday the 13th is anunlucky day --one on which many thingscan go wrong .这一句中one on which 这个one指的是什么意思,one on which ON 这里WHICH又是什么意思?