___________there are many different types of food, some animals spend their lives eating only one ty...
2022-12-24 05:51:52 16次 2013届河南省南阳市高三第一次周考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
___________there are many different types
of food, some animals spend their lives eating only one type.
|
A．Since
|
B．Unless
|
C．Once
|
D．While
|
本题链接：
