what's that?(those)、This is a dog.(these)、He's a teacher.(they)、is this a new book

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what's that?(those)、This is a dog.(these)、He's a teacher.(they)、is this a new book
what's that?(those)、This is a dog.(these)、He's a teacher.(they)、is this a new book(these)改复数 括号里的是提示

1、What's that?(those)What are those?那些是什么?2、This is a dog.(these)These are dogs.这些是狗.3、He's a teacher.(they)They are teachers.他们是老师.4、Is this a new book?(these)Are these new bo...