21.  Because there is no sure way of sterilizing instruments contaminated with prions, the discovery prompted calls for surgeons to use disposable instruments for operations involving lymph tissue.

22.  A resolution of the basic issues at stake in Kashmir is the only sure way to stabilize the region.

23.  A sure way to become a legend is to die young.

24.  A. Because he knew that was the one sure way he could be guaranteed a ticket back to prison.

25.  A sure way to experience love is to give love.

26.  A sure way to prevent scalding is to turn down the thermostat, but that decreases the effectiveness of dishwashers and washing machines.

27.  A. Avoid that at all costs, because a ledger board directly against shingles is a sure way of getting decay along that board.

28.  A. The only sure way to cure the wide gaps between your floorboards is to take them up and re-lay them close together, in wintertime.

29.  A. There is no sure way to keep copper new-looking outdoors.

30.  Absent that power, there is no sure way to tell whether ostensibly legitimate donors are laundering funds from abroad.