—I’m very worried about tomorrow’s math test. I’m afraid I can’t pass this time. — ! I’m sure you’ll make it.
A. No problem
B. That’s right
C. Cheer up
D. Don’t mention it
网友回答
A. No problem
B. That’s right
(答案→)C. Cheer up
D. Don’t mention it
解析：No problem没问题；That’s right这是正确的；Cheer up振作起来；Don’t mention it不要提了。句意：我非常担心明天的数学考试。我担心这次我不能通过。根据下文，我相信你没问题。可知选C最符合语境。