题目内容：
Some kinds of birds which were once a(n)______ sight are now becoming rare.
A)
cheery
B)
common
C)
often
D)
ordinary
参考答案：
选择题：Some kinds of birds which were once a(n)______ sig
- 题目分类：华北水利水电大学-水利水电工程-大学英语（3）
- 题目类型：选择题
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Some kinds of birds which were once a(n)______ sight are now becoming rare.
A)
cheery
B)
common
C)
often
D)
ordinary