EXERCISE A
6. The new student in the class very talkative and friendly.
The sentence is wrong because there is no verb. To be correct, some form of the verb is is needed to made the verb and the subject the new student is a singular subject that agrees with the singular verb is. So, the right sentence is:
The new student in the class is very talkative and friendly.
8. Walking with the children to school.
The sentence is wrong because there is no subject and the verb is not complete (walking). To be correct, some form of the verb is is needed to made the verb complete and the subject she is a singular subject that agrees with the singular verb is walking. So, the right sentence is:
She is walking with the children to school.
EXERCISE B
9. The plane from New York circling the airport.
The sentence is wrong because the verb is not complete (circling). To be correct, some form of the verb is is needed to made the verb complete and the subject the plane is a singular subject that agrees with the singular verb is. So, the right sentence is:
The plane from New York is circling the airport.