There____an eraser in the pencil case.A.am B.is C.are D.be应该选择哪个?

There____an eraser in the pencil case.A.am B.is C.are D.be应该选择哪个? I guess this is eraser. Can I ()(use)your eraser? I have an eraser同义句 i have an eraser.改为否定句 I have an eraser改为特殊疑问句 may your borrow i eraser 怎么造句 use eraser may your I造句 同义句转换：I have no eraser.I have （ ）（ ） eraser. Is this your eraser?---No,it isn't.I think ___.A.it her eraser B.its her eraser C.it's her eraser I have an eraser 对an eraser提问一定过要写过程 I have a eraser 这句话错在哪里? I have an new eraser.哪里错了 Please bring the eraser here.I need it. Many I have an eraser?的同义句 I have an eraser in my hand.改为同意句 May I borrow your eraser,piease?的同意句 ''Could I borrow your eraser ,please Mine is broken.