Meaning: 'Have' means to possess or own something, in this case, an endless list of factors.

Wrong options:

• lack: The word 'lack' implies absence, which contradicts the context of possessing a list of factors.
• order: 'Order' is a noun or verb that does not fit the context of possession and does not grammatically align with the subject.
• with: 'With' is a preposition that does not convey possession and does not fit the grammatical structure here.
• up: 'Up' is an adverb that does not relate to possession and does not fit grammatically in this context.
• levels: 'Levels' is a noun that does not indicate possession and does not fit the grammatical structure.

Correct answer: to

Explanation: The preposition 'to' is used to indicate direction or intention, fitting grammatically and contextually as it leads into the infinitive verb 'believe.'

Meaning: 'To' is a preposition used to indicate direction or purpose, in this case, leading to the act of believing.

Wrong options:

• have: 'Have' does not fit as it does not indicate direction or intention in this context.
• lack: 'Lack' implies absence and does not convey the intended meaning of leading to belief.
• order: 'Order' does not fit grammatically as it does not indicate direction or intention.
• with: 'With' is a preposition that indicates accompaniment, which does not fit the context of leading to belief.
• up: 'Up' does not convey direction or intention and does not fit grammatically.

Correct answer: with

Explanation: The preposition 'with' is used to indicate association or accompaniment, fitting grammatically as it connects the subject 'to suffer' with the phrase 'endless deadlines.'

Meaning: 'With' indicates association or accompaniment, in this case, suffering alongside endless deadlines.

Wrong options:

• have: 'Have' does not fit as it does not indicate association or accompaniment in this context.
• to: 'To' indicates direction or purpose, which does not fit the context of association with deadlines.
• lack: 'Lack' implies absence and does not convey the intended meaning of association.
• order: 'Order' does not fit grammatically as it does not indicate association or accompaniment.
• up: 'Up' does not convey association and does not fit grammatically.

Correct answer: up

Explanation: The adverb 'up' is used here to indicate support or reinforcement of the preceding statement, fitting grammatically as it complements the verb 'back.'

Meaning: 'Up' in this context means to support or reinforce, indicating that the figures support the claim about stress being a killer.

Wrong options:

• have: 'Have' does not fit as it does not indicate support or reinforcement in this context.
• to: 'To' does not convey the meaning of support and does not fit grammatically with 'back.'
• lack: 'Lack' implies absence and does not convey the intended meaning of supporting evidence.
• order: 'Order' does not fit grammatically as it does not indicate support or reinforcement.
• with: 'With' does not convey the intended meaning of support and does not fit grammatically.