用英语说的谜语打一成语

I.字谜：
　　1) There is a thing that is the first to pity and the last to help.
　　2) I am the beginning of sorrow, and the end of sickness.
　　You cannot express happiness without me;
　　yet I am in the midst of crosses.
　　I am always in risk, yet never in danger.
　　You may find me in the sun,
　　but I am never out of darkness.
　　3) My first is nothing but a name;
　　My second still more small;
　　My whole of so much smaller fame,
　　It has no name at all.
　　4) If the English alphabet goes from A to Z, what goes from Z to A?
　　II.事物谜：
　　1) At night they come
　　Without being fetched,
　　And by day they are lost
　　Without being stolen.
　　2) As round as an apple,
　　As deep as a pail;
　　It never cries out,
　　Till it's caught by the tail.
　　3) My sides are firmly laced about,
　　Yet nothing is within;
　　You'll think my head is strange indeed,
　　Being nothing else but s