Решение:
Для выполнения задания нужно подобрать предлоги, которые правильно сочетаются с глаголом 'look' и составляют устойчивые выражения.
- 1. I don't know the meaning of this word. I need to look up it in the dictionary.
- 2. I have lost my keys. I'm looking for them everywhere.
- 3. Can you, please, look up my cat while I'm on holiday?
- 4. I'm really looking forward to hearing from you soon.
- 5. Look out ! There is an aggressive dog over there.
- 6. I need to look into the situation which happened last week.
Ответ: 1. up; 2. for; 3. up; 4. forward to; 5. out; 6. into.