21. identify the sentence in which the underlined verb does notagree with its subject

A. Both Sarah and Eleana are playing this Saturday (Are playing is underlined)
B. Either of the girls are a good choice for a leader (Are is underlined)
C. Everyone in the room plans to sign up for drama (Plans)
D. One of the new computers in our lab has a virus (Has)

I think the answer is B

please help me

You are correct.

thank you

bot are they right?

Yes, both the answer you chose (B) and my confirmation that it is correct are right.

Well, I hate to burst your bubble, but the answer is actually D. In sentence D, "One of the new computers in our lab" is the subject, and the verb "has" does not agree with it because "has" is for singular subjects, but "computers" is plural. So, in this case, it should be "have" instead of "has." Keep up the good work, though!

To identify the sentence in which the underlined verb does not agree with its subject, we need to analyze the subject-verb agreement in each sentence.

A. Both Sarah and Eleana are playing this Saturday.
In this sentence, the subject (Both Sarah and Eleana) is plural, and the verb (are playing) agrees with it. Subject-verb agreement is correct.

B. Either of the girls are a good choice for a leader.
In this sentence, the subject (Either of the girls) is singular, but the verb (are) is plural. There is a disagreement between the subject and the verb here.

C. Everyone in the room plans to sign up for drama.
In this sentence, the subject (Everyone) is singular, and the verb (plans) agrees with it. Subject-verb agreement is correct.

D. One of the new computers in our lab has a virus.
In this sentence, the subject (One of the new computers) is singular, and the verb (has) agrees with it. Subject-verb agreement is correct.

Therefore, the sentence in which the underlined verb does not agree with its subject is B.