Let's fill in the gaps with the best-fitting words from the box:
Let's review the words used and the remaining ones:
Let's re-evaluate (B) and (F).
If (B) is "easy": "Thanks to cheap flights, it has become easy for more people to visit other countries." This also fits well.
If (F) is "popular": "For many people, travelling is one of the most popular ways to spend their free time." This also fits well.
Let's try to see if "easy" or "popular" fit better in any other gaps.
In (B): "it has become possible" vs "it has become easy". Both work. "Possible" focuses on feasibility, "easy" on the lack of difficulty.
In (F): "one of the most enjoyable ways" vs "one of the most popular ways" vs "one of the most easy ways". "Popular" and "enjoyable" are strong contenders. "Easy" is also possible, but perhaps less impactful as a primary reason for popularity compared to enjoyment or general popularity itself.
Let's try to make the best overall fit:
(A) holiday - clear.
(B) Let's consider "easy". "Thanks to cheap flights, it has become easy for more people to visit other countries." This fits well.
(C) opportunity - clear.
(D) expensive - clear.
(E) safe - clear.
(F) If B is 'easy', then the remaining words are 'possible' and 'popular'. Between 'enjoyable' and 'popular' for (F), 'popular' sounds like a concluding statement about its status. "one of the most popular ways". This feels right.
Let's test this set:
A: holiday B: easy C: opportunity D: expensive E: safe F: popular
Words used: holiday, easy, opportunity, expensive, safe, popular.
Remaining words: possible, enjoyable.
This means 'possible' and 'enjoyable' are extra.
Let's re-read the sentences with this set:
Travelling is very popular today. Some people travel for work, others for (A) holiday. Thanks to cheap flights, it has become (B) easy for more people to visit other countries. When we travel, we have an (C) opportunity to learn about new cultures and traditions. However, travelling can sometimes be (D) expensive if we don't plan carefully. It's also important to be (E) safe and follow safety rules when visiting new places. For many people, travelling is one of the most (F) popular ways to spend their free time.
This seems to be a very coherent set of answers.
Let's consider the other option for (B) and (F):
If (B) is "possible": A: holiday B: possible C: opportunity D: expensive E: safe F: enjoyable (or popular) If F is "enjoyable": "one of the most enjoyable ways".
Let's consider the most direct benefit of cheap flights. Cheap flights make it more possible and also potentially easy. For (F), "popular" implies it's chosen by many, and "enjoyable" implies it's pleasant. Both are good reasons for popularity.
Let's check the wording again. "Thanks to cheap flights, it has become (B) ____ for more people to visit other countries." This sentence is about the ability/feasibility. "Possible" emphasizes the ability, "easy" emphasizes the simplicity. Both are valid. However, "possible" directly counters the idea that it's too difficult or expensive before cheap flights.
Let's try assigning "possible" to (B):
A: holiday B: possible C: opportunity D: expensive E: safe
Remaining words for (F): enjoyable, popular, easy.
For (F): "one of the most ... ways to spend their free time." Both "enjoyable" and "popular" fit well. "Easy" also fits. Since two words are extra, it's likely that the best fits are used for A-F. If "easy" is not used in B, it could be used in F.
Let's assume the most straightforward fits:
(A) holiday (B) possible (as in, it is now possible) (C) opportunity (D) expensive (E) safe (F) enjoyable (as in, a pleasant way to spend time)
Words used: holiday, possible, opportunity, expensive, safe, enjoyable.
Remaining words: easy, popular.
This set uses 'possible' and 'enjoyable'. The other set used 'easy' and 'popular'. Both seem plausible. Let's review the options again and try to find the *most* fitting word for each gap.
Sentence (B): "Thanks to cheap flights, it has become (B) ____ for more people to visit other countries." Cheap flights make travel more affordable, which makes it more possible. They can also make it easy if it implies simpler logistics or less financial burden.
Sentence (F): "For many people, travelling is one of the most (F) ____ ways to spend their free time." This is a statement about the nature of travel as an activity for free time. "Enjoyable" describes the experience, "popular" describes its commonality, and "easy" describes the ease of doing it. "Popular" seems to be a strong concluding statement of why many people do it.
Let's favor "possible" for (B) and "popular" for (F) as they seem to capture the primary meaning in context.
A: holiday B: possible C: opportunity D: expensive E: safe F: popular
Words used: holiday, possible, opportunity, expensive, safe, popular.
Remaining words: easy, enjoyable.
This seems like a very solid set.
Final check:
(A) holiday - yes. (B) possible - yes, cheap flights make it possible. (C) opportunity - yes, to learn. (D) expensive - yes, if not planned. (E) safe - yes, important to be safe. (F) popular - yes, it is a popular way to spend time.
This mapping uses 6 words, leaving "easy" and "enjoyable" as extra. This aligns with the instruction that two words are extra.