Meaning: 'To win' means to achieve victory in a competition, which in this context refers to Tiger Woods achieving this milestone in golf.

Wrong options:

• winning: 'Winning' is a gerund and does not fit the infinitive structure required here.
• to be winning: 'To be winning' suggests an ongoing action, which does not align with the completed achievement of becoming the first golfer.
• to have been won: 'To have been won' implies a completed action in the past, which does not fit the context of becoming the first golfer.

Correct answer: competitions

Explanation: The word 'competitions' is a noun that correctly refers to events where golfers compete, fitting grammatically as it aligns with the context of professional golf events.

Meaning: 'Competitions' refers to events where individuals or teams compete against each other, in this case, in golf.

Wrong options:

• competitively: 'Competitively' is an adverb and does not fit as a noun in this context.
• contestants: 'Contestants' refers to individuals participating in a competition, but does not fit as a general term for the events themselves.
• contests: 'Contests' is a synonym but is less formal and does not match the professional context as well as 'competitions.'

Correct answer: all

Explanation: The word 'all' is a determiner that appropriately indicates the totality of the four championships, fitting grammatically and contextually within the sentence structure.

Meaning: 'All' means the entire number or amount, indicating that Tiger Woods held every one of the four championships simultaneously.

Wrong options:

• whole: 'Whole' implies completeness but does not convey the same meaning of totality as 'all.'
• the all: 'The all' is not a standard phrase in English and does not fit grammatically.
• the whole: 'The whole' is similar to 'whole' but does not fit the context of counting championships.

Correct answer: at

Explanation: The preposition 'at' is used to indicate a specific point in time or location, which fits grammatically and contextually with 'the same time.'

Meaning: 'At' indicates a specific point or moment, in this case, referring to the simultaneous holding of championships.

Wrong options:

• for: 'For' suggests a duration or purpose, which does not fit the context of a specific time.
• within: 'Within' implies being inside a boundary or limit, which does not apply here.
• in: 'In' could suggest a period but does not convey the same precision as 'at' in this context.

Correct answer: won

Explanation: The word 'won' is the simple past tense of 'win,' which fits grammatically as it indicates a completed action in the past, aligning with the timeline of events.

Meaning: 'Won' means to have achieved victory in a competition, indicating that Tiger Woods achieved this in the past.

Wrong options:

• has won: 'Has won' is present perfect and suggests an ongoing relevance, which does not fit the past context here.
• was won: 'Was won' implies that someone else won, which is incorrect as it refers to Tiger Woods' achievement.
• has been won: 'Has been won' is also present perfect passive, which does not fit the active context of Tiger Woods winning.