سوال ۲ کنکور ارشد مهندسی کامپیوتر ۱۴۰۳

The sentence needs a word meaning "laid open / subjected to" the sun — exactly the situation in which sunscreen is needed. The fixed collocation is be exposed to (the sun), so option 4 is correct.

• exposed (to) — left unprotected and subjected to; exposed to the sun is the standard collocation. ✓
• demonstrated — shown/proved; does not collocate with to the sun in this sense.
• confronted (with) — faced directly (usually a problem); wrong preposition and meaning.
• invulnerable (to) — incapable of being harmed; this is the opposite of what justifies wearing sunscreen.

Exam trick: Let the context verb decide. Sunscreen protects against sun damage, so the missing word must describe being subjected to the sun — "exposed to" — not being immune to it ("invulnerable").