Amy insists that she the secret to lose weight. But she won’t share it with us.
A. had discovered
B. discovers
C. has discovered
D. will discover
网友回答
A. had discovered
B. discovers
(答案→)C. has discovered
D. will discover
解析：考查动词时态。此题中insist 意为“坚持说，坚持认为”；后面不用虚拟语气，另据题意，Amy坚持说她已经发现减肥的秘密了”，C选项中的现在完成时照应主句的一般现在时，故选C。