Fill in: both (of), neither (of), none (of) or all (of). deborah and carla are friends. they 1) like skiing and mountain-climbing but 2) them likes water sports, so they often go on winter holidays together. last winter, they went to switzerland with 3) their friends who like skiing and they 4) had a wonderful time. unfortunately, 5) their friends could stay for more than a week but 6) . . . deborah and carla are planning to go again this year. 7) them would miss it for the world!

BothNeither ofAll ofAllNone ofBothNeither of

1) All of
Both Deborah and Carla like skiing and mountain-climbing.
Explanation: The phrase "both of" is used to indicate that both Deborah and Carla have the same preference for skiing and mountain-climbing.

2) Neither of
Neither of them likes water sports.
Explanation: The phrase "neither of" is used to indicate that neither Deborah nor Carla has a preference for water sports.

3) Their
Last winter, Deborah and Carla went to Switzerland with their friends who like skiing.
Explanation: The possessive pronoun "their" is used to show ownership. In this case, Deborah and Carla went with their friends.

4) Had
They had a wonderful time.
Explanation: The verb "had" is used to indicate the experience or enjoyment of something. In this case, Deborah and Carla had a wonderful time on their winter holiday.

5) None of
None of their friends could stay for more than a week.
Explanation: The phrase "none of" is used to indicate that none of Deborah and Carla's friends could stay for more than a week.

6) None of
None of them could.
Explanation: The phrase "none of" is used to indicate that neither Deborah nor Carla could do something. In this case, neither of them could stay for more than a week on their winter holiday.

7) Neither of them would miss it for the world!
Explanation: The phrase "neither of them" is used to indicate that both Deborah and Carla would not miss the opportunity to go on the winter holiday again this year. The phrase "for the world" is an idiomatic expression indicating a strong affirmation or commitment to something.