should 可以用来表示意外、惊喜或者在说话人看来是不可思议的。尤其在以 why， who， how 等开头的修辞疑问句或某些感叹句中常常译为“竟会”、“居然”。例如

How should I know it ？

Why should you be so late today ？

When I went out， whom should I meet but my old friend Xiao Li ！ 

I don‘t see any reason why he shouldn’t be happy.

It is a great pity/ shame/ that he should be so conceited.

 That anybody's soul should want to live for more than half a million years and not be perfectly content is a kind of preposterousness that an Oriental mind cannot understand.

  ---- 摘自 林语堂 My Country and My People

1. I  am sorry that he ___ in such poor health.

  A. are   B. shall be   C. were   D. should be

2. You can't imagine such a well-educated gentleman ___ be so rude to an old man.

  A. might   B. must   C. should    D. would

3. --How ______ he drive at a speed of 180km ph?
     ---- It was surprising to us all,too.

4. What shocked us most in this year's college entrance examinations was that the one who won the fist place ___ be a boy at the age of 13.
  A. could    B. should   C. would   D. might

5. I can't believe my eyes. There ____ such a modern school in so small a town.

  A. might be   B. will be   C. should be   D. can be