句型转化：This is 【 my good friend】.(对中括号的内容提问) （ ） is this?It's an English book.(变成一般疑问句)( ) ( ) an English book He is a math teacher.(变成否定句)He （ ） a math teacher.
问题描述：
句型转化：This is 【 my good friend】.(对中括号的内容提问) （ ） is this?
It's an English book.(变成一般疑问句)
( ) ( ) an English book
He is a math teacher.(变成否定句)
He （ ） a math teacher.
答
(It)(is)(isn't)
答
1.this is
2.isn't
答
Who \is it\isn't