问题补充：
I am and they are .
A. the Chinese; German
B. Chinese; German
C. a Chinese; Germans
D. Chinese; the German
答案：
A. the Chinese; German
B. Chinese; German
(答案→)C. a Chinese; Germans
D. Chinese; the German
解析：I’m s Chinese.意为：我是中国人；I’m Chinese.意为：我是中国籍；而German的复数是Germans。
