I have three pens,none of them is expensive中的一个语法错误是什么啊,是不是问题在none of them上啊

I have three pens and Tony has six pens. Tom has five pens and I have two pens.(改为同意句）I have three pens _____ _____ Tom. Mike has three pens.But I o ________ have one. I have bought three ballpoint pens,none of _____writes smoothly. I HAVE _________.A.THREE BOX OF PEN .B.THREE BOX OF PENS .C.THREE BOXES OF PEN .D.THREE BOXES OF PENS. 关于less和fewer.I have three pens less than him.pen是可数名词,为什么这里不是I have three pens fewer than him. 1.I have no pens ( ) no pencils.2.I have no pens ( ) pencils.A.and B.or请问分别填什么, 1.which sentence is wrong?A.I have three pens,they are all in my pencil-box.B I have three pens,and they are all in my pencil-box.C.I have three pens,which are all in my pencil-box.D.I have three pens.They are all in my pencil-box.为什么选择A2.W I have three pens,none of them is expensive中的them应改为which, I have three pens in my pencil case.改为同义句 I have three pens in the bag （同义句）英语 he has five pens and I have two pens.（改为同义句）I have three pens_ _（两空）he. I have no pens.A.don't haveI have no pens.A.don't have B.not have C.no have 选出与have no 意义最接近的解释. (选择)i have not pens.A no B not a C not 同义句转换.john has five pens and i have two pens.i have three pens____ ____ john.对啊,pens 是可数名词 我认为应该是fewer,可答案是less 认为是less 的,能说明下原因吗? I have three pens.He has only one.(合并句子） I have________pens______he.横线上填什么 句子I have three pens,but I want to get more.的More既是比较级,又是替代词吗? l have three pens in my pencil-box