горещото слънце

"Добра идея" is feminine, so we need to add "-та" to the adjective "добра": "добрата"

"Бързи влакове" is plural, so we need to add "-те" to the adjective "бързи": "бързите"

"Ниска маса" is feminine, so we need to add "-та" to the adjective "ниска": "ниската"

"Дълго интервю" is neuter, so we need to add "-то" to the adjective "дълго": "дългото"

"Красиво цвете" is neuter, so we need to add "-то" to the adjective "красиво": "красивото"

"Красиви цветя" is plural, so we need to add "-те" to the adjective "красиви": "красивите"

"Трудна игра" is feminine, so we need to add "-та" to the adjective "трудна": "трудната"

"Топло мляко" is neuter, so we need to add "-то" to the adjective "топло": "топлото"

"Стари дрехи" is plural, so we need to add "-те" to the adjective "стари": "старите"

"Студена река" is feminine, so we need to add "-та" to the adjective "студена": "студената"