Вопрос, который вызвал трудности

Задания на фразовый глагол LOOK. Выберите правильный вариант ответа из предложенных.
1)Jen has to __________ her younger sister this weekend.
look forward to
look after
look up
look for
2)Will you ____ this person in the telephone book, please?
look forward to
look after
look up
look for
3)Why don't we ____ a cheap summer holiday on the Net?
look forward to
look after
look up
look for
4)I'll get the dictionary and _______ the words I don't know.
look forward to
look after
look up
look for
5)She ________ her mother when she's ill.
looks forward to
looks after
looks up
looks for
6)What are you ________ ? - My keys.
looking forward to
looking after
looking up
looking for
7)I'm really ________ the weekends.
looking forward to
looking after
looking up
looking for

Ответ экспертов Учись.Ru

Чтобы дать полноценный ответ, был привлечён специалист, который хорошо разбирается в теме.

После обсуждения с другими специалистами сервиса мы пришли к выводу, что правильный ответ на ваш вопрос будет звучать следующим образом:

1)    Jen has to look after her younger sister this weekend.  
2)    Will you look for this person in the telephone book, please?  
3)    Why don't we look up a cheap summer holiday on the Net?  
4)    I'll get the dictionary and look for the words I don't know.  
5)    She looks after   her mother when she's ill.  
6)    What are you looking up? - My keys.      
7)    I'm really  looking forward to  the weekends.

1 look after
2 look up
3 look for
4 look up
5 look after
6 looking for
7 looking forward