Resolution:
- a. He was sick yesterday. (Past simple tense for singular subject 'He').
- b. I was in the football team last year. (Past simple tense for singular subject 'I').
- c. Were you at school yesterday? (Past simple tense for plural/question form with 'you').
- d. She isn't late for school today. (Present simple tense for current situation with singular subject 'She').
- e. Where were your brother and sister last weekend? (Past simple tense for plural subject 'your brother and sister').
- f. We weren't at home last night. (Past simple negative for plural subject 'We').
- g. It was sunny and hot yesterday. (Past simple tense for singular subject 'It').
Final Answer: The correct options have been selected based on subject-verb agreement and tense consistency.