• 2022-05-31
    Could you tell me how many colours [u]     [/u] in a rainbow?
    未知类型:{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181}
    A: there are
    B: are there
    C: they are
    D: are they