英语 改复数句This is a pen.Is this your backpack?It's a black bag

英语 改复数句This is a pen.Is this your backpack?It's a black bag This is a black backpack改为同义句 This is a backpack(改为复数句子)怎么改? this is a pen.改为复数句 以下句子变成复数句Is this your ruler?yes,it is.It's his backpack.What Is （）your pen?No,（）isn't.it's（）pen A.this.this.h 英语!单数句改复数!1.He is a boy2.This is his pen3.It's an English bo This is my pencil.（改为复数句） It's his backpack.（改为复数句） Is this a your pen? 英语单项选择( )11.---Tom,is this your pen?---Yes,it's _______ A.yo What's this?It's a pen.(改为复数句) Look,this is a pen.lt's black.This is a pencil.lt's red .And