Can you tell me ? You look upset.
A. what the matter is
B. what matter it is
C. what is the matter
D. what was the matter
网友回答
A. what the matter is
B. what matter it is
(答案→)C. what is the matter
D. what was the matter
解析：考察宾语从句，what is the matter ？陈述句和疑问句语序一致，再有应该用一般现在时，“能告诉我你怎么了么？你看起来很烦。”答案C。