问题 更新时间2023/4/3 12:59:00 5.0Some kinds of birds which were once a(n)______ sight are now becoming rare.A)cheeryB)commonC)oftenD)ordinary 答案 登录 注册 参考答案: B 出自:和学 >> 华北水利水电大学-工商管理-大学英语(3)