13 Make sure you wear a hat when you're out in the ....... weather.

Rationale:

• The sentence describes weather conditions that require protection (a hat).
• 'Hot' or 'sunny' weather would necessitate a hat. 'Boiling' is a strong form of hot. 'Steaming' and 'baking' can describe hot conditions but 'boiling' is often used in this context.
• 'Boiling' describes very hot weather.

Answer: B boiling