1. Enlist, listen, silent
2. a) Cowrie b) Henceforth c) Bullhorn
4. Dog (dogged, doggerel, dogmatic, dogsled)
5. The answer is 10. (Each teenager eats at the rate of one pizza per day.)
6. Sam (Sam, Susan, Tom, Alice, Bill)
7. Don’t count your chickens (before they hatch).
Bonus Answer: 22. (11 years ago, Sophie was 11.)
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QUESTION: American Airlines was the first airline to introduce freight service in the United States. In what year did those flights begin?