在expect, believe, think, suspect等动词的否定或疑问形式后的宾语从句中，我们经常用“should+动词原形(或完成形式)”，表示惊奇，怀疑，不满等。
I never thought that he should be such a brave young soldier.
我们从来没想到他是个如此勇敢的小战士。
练习：
1) that the time will soon be ripe for intervention in Iran，they would be faced by a large army?
[A]It is believed
[B]Should they believe
[C]They would believe
[D]If they would believe
2) I think it advisable that he for Tokyo soon.
[A]will leave
[B]may leave
[C]leave
[D]leaves
