The correct verb to fill in the blank is plays. 

• The sentence indicates a habitual action or routine, which is typically described using the simple present tense.
• The subject "My brother" is third-person singular (he, she, it).
• In the simple present tense, for third-person singular subjects, we add -s or -es to the base form of the verb.
• The base form of the verb "to play" is "play". When conjugated for third-person singular (My brother), it becomes "plays".

Therefore, the correct sentence is:

• My brother plays tennis every weekend.

This describes the routine or habit of playing tennis regularly on weekends.

The correct word to finish the sentence is went.

• The sentence describes an action that occurred and was completed in the past.
• "Went" is the past tense form of the verb "to go".
• In this context, "They" is the subject, and the action of attending the concert happened last night, indicating a specific point in the past.

Therefore, the correct sentence is:

• They went to the concert last night.

This sentence correctly uses the past tense verb "went" to indicate the action of attending the concert in the past.

The correct completion of the sentence is will buy.

• The sentence indicates a future action that will happen.
• "Will buy" is a future tense construction, where "will" is the modal auxiliary verb indicating future tense, and "buy" is the base form of the verb indicating the action of purchasing something.
• The phrase "will buy" indicates that the action of buying a new car is planned or intended to happen in the future.

Therefore, the correct completion of the sentence is:

She will buy a new car next month

The correct verb form to fill in the blank is have lived. 

• The sentence indicates an action that started in the past (five years ago) and continues up to the present moment.
• "Have lived" is the present perfect tense form of the verb "to live".
• In the present perfect tense, we use the auxiliary verb "have" (for plural subjects like "We") or "has" (for singular subjects like "He", "She", "It") followed by the past participle form of the main verb.
• The past participle of "live" is "lived".

Therefore, the correct completion of the sentence is:

• We have lived in this city for five years now.

This indicates that the action of living in the city started in the past (five years ago) and continues up to the present time. The use of "have lived" in the present perfect tense emphasizes the duration of the action from the past until now.

The correct verb to complete the sentence is goes.

• The sentence describes a habitual action or routine that occurs regularly.
• "Goes" is the third-person singular form of the verb "to go" in the simple present tense.
• In English grammar, when the subject is third-person singular (he, she, it), we add -s or -es to the base form of the verb in the simple present tense.
• The base form of the verb "to go" is "go". When conjugated for third-person singular (He), it becomes "goes".

Therefore, the correct completion of the sentence is:

• He goes to the gym three times a week.

This sentence correctly describes the habitual action of going to the gym on a regular schedule.

The correct form of the verb to fill in the blank is goes.

• The sentence describes a habitual action or routine that happens regularly.
• "Goes" is the third-person singular form of the verb "to go" in the simple present tense.
• In English grammar, when the subject is third-person singular (he, she, it), we add -s or -es to the base form of the verb in the simple present tense.
• The base form of the verb "to go" is "go". When conjugated for third-person singular (She), it becomes "goes".

Therefore, the correct completion of the sentence is:

• She goes to school by bus every day.

This sentence correctly describes the routine or habit of traveling to school by bus regularly.