ls this your school?

ls this your school? ls++this++your++school是什么意思 Excuse me,sir,ls this your school?怎样回答 英语ls this your ls this your ls your home near your school? ls your school big?怎么回答~ ls this your computer?改为肯定陈述句 ls this your schoolbag的中文是什么 ls this your eraser?做出否定回答 ls this your ruler改为复数句 ls this your backpack? 改为陈述句 ls this your mobile作肯定回答 ls your school far from your home?回答句子 ls your classmate_______(clean)the classroom after school? ()2.--_______there a lake near your school?---Yes,there_______.A.Are；areB.ls；areC.ls；is ls this your pen?yes,itisn't 哪里错了? ls this your pen?(改为肯定句）