(yes,it is)(ls it an eraser)(no,it isn't)(ls it your pencil box,too?

(yes,it is)(ls it an eraser)(no,it isn't)(ls it your pencil box,too? (yes,it is.)(ls it an eraser)(no,it isn't.)(ls ie your pencil box,too)这些分别是什么意思? ls this an apple?的肯定回答是Yes,this is an apple.还是Yes,it is an apple.就是“this/that”的回答是“this/that”还是“it”.啊、到底是it is还是this啊 10.英语：单项选择10.--- _________ your name Jane?--- Yes,_________ .A.ls,it is B.Are,l am C.ls,it’s D.Are,it is 用(a an the) 1.--ls that____animal? Yes,it's_______little pig 2 .Close_____book,please.3.Mike has______orange bicycle,lt'snew 4 Look at____kite lt is highin_____sky _ _ _ ls that____(you) classroom?----yes,it is.填空 -Ls your name Brown?应选A.Yes,l am B.Yes,it is C.Yes,l'm D.Yes,it's （ ）（ls this/are these）your picture books?yes（ ）（ls this/are these）your picture books?yes,( )(it.is/they are).填空 把下列句子改为复数句子That is my sister Ls this his parent Ls she your friend Yes it is This is my cup 急 8.七年级英语：单项选择8.---ls Mary your friend? --- ___________________. A.Yes,it is B.Yes,he is C.Yes,she is D.Thank you ls it far?yes,so l'm going by train. ls it for me?-Yes,( ) 该怎么填呢? yes,it is.it's 这是一道题：ls football your favourite game?A.Yes,it is.B.Yes,you are.C.Yes,l am. yes,it is your yes it is.翻译 A:It's an animal.B:Is it big?A:Yes,it's very ------.B:Is it a horse?A:No,------.B:Is it atigher?A:No,it isn't.B:Is it an elephant?A:Yes,it is. This it is an eraser.这个句子该用在哪,怎么用?为什么不用This ls an eraser.