Решение:
Соединим слова и запишем словосочетания:
- to take - sightseeing (to take sightseeing)
- to spend - guests (to spend guests - не имеет смысла, скорее всего, имелось в виду 'to spend money' или 'to spend time')
- to invite - summer holidays (to invite to summer holidays)
- to go - sightseeing (to go sightseeing)
- to improve - a dictionary (to improve a dictionary - не типичное словосочетание)
- to borrow - a dictionary (to borrow a dictionary)
- to take care of - care of (to take care of)
Ответ: to take sightseeing, to go sightseeing, to borrow a dictionary, to take care of.