Краткое пояснение: Составляем предложения с фразовыми глаголами, используя данные слова.
- I looked for the key.
- I looked out the key.
- I found out the key.
- I found the answer.
- I came across the key.
- I came across the answer.
- I came across the identity of the criminal.
- I worked out the answer.
- I worked for the identity of the criminal.
Ответ: смотри решение в развернутом виде