I felt surprised that anyone of his intelligence such an easy test.
A. might have failed
B. could have failed
C. should have failed
D. must have failed
网友回答
A. might have failed
B. could have failed
(答案→)C. should have failed
D. must have failed
解析：句意：.我感到惊讶是象他这样智力的人居然连如此简单的测试都没有通过。might have failed可能没通过；could have failed有可能没通过；must have failed一定没通过；should在这里表示惊讶的态度。故选C。
考点: 考查情态动词表推测的用法。