My 4th is in wool, but not in yarn.

My 5th is in take, but not in give.

My 6th is in strainer, but not in sieve.

My 7th is in rye, but not in wheat.

And my whole is sometimes good to eat.

78. Why is a weathercock like ambition?

79. Why is a Turk like a violin belonging to an inn?

80. Why is a used up horse like a bad play?

81. Why is a sick Jew like a diamond ring?

82. Why is a printer like a postman?