This is an apple.And( )is red.括号里填什么

These are an apple and a pear.还是This is an apple and a pear. is this an apple an orange__an egg This is an apple就an apple部分转换提问 this,is,an,and,book,that,a,is,apple 连词成句 This is an apple.And( )is red.括号里填什么 this is an apple.改成复数形式 This is an apple 变为复数句子 an,is,apple,this连词成句 （）1.This is () pear and that is () apple.A.a,an B.a,a C.an,a this is an apple 和 this is apple 哪个语法是正确的 this is an apple中为什么要用不定冠词不用可不可以,能不能写成This is apple There is an apple and two pens There are an apple and two pens 哪个对 3.Is this （ ）apple tree?No,（ ）tree is（ ）orange tree.A.an,a,theB.a,the,anC.an,the,anD.the,the,an 简单英语句型转换1.It is an English-Chinese dictionary.(改为一般疑问句)2.This is an apple and that is a pear.(转化成复数) this is an apple怎么改为复数句 This is （an apple）对括号部分提问 This is an apple,that's a knife句型转换 This is (an apple)打括号的地方提问