1. 直接考查虚拟语气的用法
―Don’t you think it necessary that he _______ to Miami but to New York?
― I agree, but the problem is _______ he has refused to.
A. will not be sent; that
B. not be sent; that
C. should not be sent; what
D. should not send; what
答案为B。因为necessary后的从句要用“(should+)动词原形”，排除选项A；因he与send是被动关系，send要用被动式，排除选项D；答句中的表语从句中不缺任何句子成分，用that。值得说明的是，refuse to后省略了be sent to New York。
2. 利用虚拟语气背景进行命题
(1)_______ he had not hurt his leg, John would have won the race.
A. If B. Since
C. Though D. When
答案为A。全句使用的是虚拟语气背景，if在此引出一个虚拟条件。
(2) If Newton lived today, he would be surprised by what ______ in science and technology.
A. had discovered
B. had been discovered
C. has discovered
D. has been discovered
答案为D。此题可用排除法来做。根据what与discover的关系可知，此处应用被动语态，即指被发现的东西，故可排除选项A和C；由于句子使用了虚拟语气， 所以此题的迷惑性很大，许多考生会误选B。其实，由于句中的虚拟语气是对现的情况进行假设（注意句中的today），而且“在科学和技术方面所取得的发现”指的是现在的事实，而非假设，所以此处要用现在完成时，而不能用过去完成时。