Question

Now 70 years old, the British physicist, Pendry can’t remember a time when he was not asking a question as a kid, joking that he ________ his parents to death

1. A.
   should torment(折磨)
2. B.
   must torment
3. C.
   must have tormented
4. D.
   should have tormented

Answer 1

C
试题分析：考查情态动词与虚拟语气。句意：现在，70岁的英国物理学家Pendry记得儿时，总是被问同样的一个问题，开玩笑说他一定是折磨死了他的父母。根据joking可知，事情不是真实的，用虚拟语气。must have done一定已经做了某事；should have done sth本应该做某事。故选C。
考点：考查情态动词与虚拟语气