There is but one danger which can threaten us. It is that he should strike before we are ready to do so.

Another day - two at the most - and I have my case complete, but until then guard your charge as closely as ever a fond mother watched her ailing child. 

1) It is that he should...这是强调句吗？

2) It is that he should...中，这里的should是情态动词的“推测”表可能性用法吗？

3) have my case complete: 这是have+sth+adj 句式, adj是宾补吗？