未分类题

____birds use their feathers for flight, some of their feathers are for others purposes.
A.Once
B.If
C.Although
D.baecause

A.A.

【参考答案】

C
[翻译]虽然鸟用羽毛来飞行,(但是)一些羽毛是用作其他用途的。
[解析]本题考察状语从句,前后两句之......

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