they are nine改为一般疑问句

they are nine改为一般疑问句 They are swimming.(改为一般疑问句) They are speak English 改为一般疑问句 they are their erasers 改为一般疑问句 They are happy.改为一般疑问句, they are my grandparents 改为一般疑问句 They are pretty 改为一般疑问句 They are drivers.改为一般疑问句 they are for you改为一般疑问句 They are teacher,（改为一般疑问句） They are healthy.（改为一般疑问句） They are Chinese workers.改为一般疑问句