1.This is.2.That is.3.What is this/ that?It's a/an.4What's t

what's_?__a pen ?a 、this;this is b 、this;it's c 、 that;that' —What's that?It'_________library 填a,an,the —Is this _______c 改为复数形式 Is that an English book?What"s this in English?It is 单复数句型转换It is a bag.Is that an eraser?What's this in English? （单数句子变成复数） 1.This is a map.2.That's an orange orange.3.—What what is this 回答 与what is that 回答用It's 还是this is and that is哪 what's that?( )is a key.1、this 2、that 3、it ()36.Hello.This is Mary._________?A.Who's that B.What is it 1.What's this in english?______a jeep.A.this is B.That's C.I What's this?___ A This is a dog B That's C It's a dog D I'm what's that in English lts a bag( ) what's this?This is"C"( [1.This`s 2.this is 3.that]a book.