Question

1. The bus company ___ the threat it had received, so it checked all of its buses for explosives.
2. Don't forget to ___ your clocks ___ by one hour tonight, as it's the last Saturday in October.
3. British naval ships ___ the German the German battleship, the Bismarck, with numerous shells and torpedoes.

Answer 1

1. Acted on.
2. set....back.
3. went at.

Answer 2

acted on

set...back

went at