We are from China.改为一般疑问句

We are from China.改为一般疑问句 There are two letters from China.(改为一般疑问句） We are from China改为否定句,并作肯定回答.改为一般疑问句,并作否定回答 We are from Beijing.(改为一般疑问句并回答） we are from london.改为一般疑问句,并作两种回答 she is from china 改为一般疑问句 I"m from China改为一般疑问句 I am from china 改为一般疑问句 They are from China 改一般疑问句 You are from China 改一般疑问句 We are from Brazil.这句改为一般疑问句怎么改?we该改为什么? we are from china 改为否定句