Meaning: 'Several' means more than two but not many, suggesting a moderate number of exercises that are performed.

Wrong options:

• plenty: 'Plenty' implies a large amount, which does not fit the context of doing a few exercises before training.
• lost: 'Lost' is an adjective that does not fit grammatically or contextually as it does not describe the quantity of exercises.
• much: 'Much' is typically used with uncountable nouns and does not fit with the countable noun 'exercises'.

Correct answer: training

Explanation: The word 'training' is a gerund that functions as a noun in this context, indicating the action of preparing for physical activity. It fits grammatically as it follows the preposition 'before'.

Meaning: 'Training' refers to the process of preparing for a specific physical activity or sport.

Wrong options:

• to train: 'To train' is an infinitive form and does not fit grammatically after 'before', which requires a gerund or noun.
• to training: 'To training' is incorrect as 'to' cannot precede a gerund in this context.
• train: 'Train' is a verb form that does not fit grammatically as it does not function as a noun in this context.

Correct answer: on

Explanation: The preposition 'on' is used to indicate focus or attention directed towards something, which fits well in the context of concentrating on one's body and feelings. It aligns grammatically with the phrase 'focus on'.

Meaning: 'On' indicates the direction of focus, meaning to concentrate or pay attention to something.

Wrong options:

• about: 'About' suggests a general topic but does not convey the same sense of direct focus as 'on'.
• in: 'In' does not fit grammatically in this context as it does not indicate the direction of focus.
• to: 'To' is used to indicate direction or purpose but does not fit with the phrase 'focus on'.

Correct answer: are achieved

Explanation: The phrase 'are achieved' is in the passive voice, indicating that exercise goals are accomplished by people. It fits grammatically as it agrees with the plural subject 'goals'.

Meaning: 'Are achieved' means that the goals are successfully completed or reached by individuals.

Wrong options:

• achieve: 'Achieve' is an active verb form that does not fit grammatically as it lacks a subject and does not convey the passive meaning needed here.
• are achieving: 'Are achieving' suggests an ongoing action, which does not fit the context of goals being completed.
• can achieve: 'Can achieve' implies potential but does not fit the context of stating that goals are already accomplished.

Correct answer: which

Explanation: The word 'which' is a relative pronoun that introduces a clause providing additional information about the video. It fits grammatically as it connects the clause to the noun 'video'.

Meaning: 'Which' is used to refer to a specific thing or group, in this case, the video that can be accessed.

Wrong options:

• where: 'Where' refers to a place and does not fit grammatically as it does not relate to the noun 'video'.
• who: 'Who' is used for people and does not fit as it does not relate to the noun 'video'.
• there: 'There' is an adverb indicating a place and does not fit grammatically or contextually in this sentence.