问题补充:
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
答案:
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。