This is an English pen

this is an english book( )that is pen this is a pen on English.改错 is ,an,book,english,this this is an english book （）that is a pen 填空,有选择,and,too,but,o What's this?——___.(①It's a pen.②This is pen.③This is an pen. 为什么This pen is easy to write with.可以变成This is an easy pen to what is this in English?It is a pen而不是It is a pen(英语) This is ( a pen) in English ? 对划线部分提问 连词成句：in,this,pen,a,English,is （ ）-Is this your pen?-___the teacher in English? This is (a pen ) in English(就括号部份提问) This is an English car.对an English提问