Các bạn giúp mình giải thích chỗ 'ta có' mà mk gạch chéo màu đen với ạ ??(chỗ đó mk chưa hỉu)

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V.Choose the correct form of the verb in the following sentences. 1. Neither Bill nor Mary (is/are) going to the play tonight. 2. Anything (is/are) better than going to another movie tonight. 3. Skating (is/are) becoming more and more popular everyday. 4. A number of reporters (was/were) at the conference yesterday. 5. Everybody who (has/have) a fever must go home immediately. 6. John, along with twenty friends, (is/are) planning a party. 7. The picture of the soldiers (Bring/brings) back many memories. 8. The quality of these recordings (is/are) not very good. 9. If the duties of these officers (isn’t/aren’t) reduced, there will not be enough time to finish the project. 10. The effects of cigarette smoking (have/has) been proven to be extremely harmful. 11. Your glasses (was/were) on the bureau last night. 12. There (was/were) some people at the meeting last night. 13. The committee (has/have) already reached a decision. 14. A pair of jeans (was/were) in the washing machine this morning. 15. Each student (has/have) answered the first three questions. 16. The use of credit cards in place of cash (have/has) increased rapidly in recent years. 17. Advertisements on television (is/are) becoming more competitive than ever before. 18. Mr. Jones, accompanied by members of the committee, (have/has) proposed some changes of the rules. 19. Living expenses in this country, as well as in many others, (is/are) at an all-time high. 20. The levels of intoxication (vary/varies) from subject to subject.