Is your brother and sister workers?这句话哪里错了?

Is your brother and sister workers?这句话哪里错了? 改错-Is your brother and sister workers? Yes,they are 改错-is your brother and sister workers?yes,they are Is your brother play computer games on Saturday?这句话哪里错了 Is your brother speak English这句话哪错了 Is this your brother?Yse,he is.哪里错了 Is your brother speak Engliash?哪里错了 what is animal does your brother like?哪里错了? Is your brother skate well?哪里错了? Is your sister study in the shudy?哪里错了 what is your name这句话哪里错了 Dick and Betty is sister and brother.