giúp mình vs ạ giải thích tại sao làm vậy nha phần sự hòa hợp giữa chủ ngữ và động từ 1. Tom with dog_____ here now. a. is b. are c. was d. were 2. Tom as well as his dog_____ here now. a. is b. are c. was d. were 3. My old friends and colleague, John, _____ married. a. has just got b. have just got c. just has got d. just have got 4. The singer and actor_____ coming now. a. was b. were c. is d. are 5. The singer and the actor_____ coming now. a. was b. were c. is d. are 6. Mathematics_____ difficult. a. is b. are c. is d. are 7. Two billion dollars_____ not enough for the victims of the tsunami a. was b. were c. is d. are 8. Three years in a strange land _____ like a long time for lonely people. a. is seeming b. are seeing c. seems d. seemed 9. The film "Titanic"_____ very interesting. a. is b. are c. was d. were 10. Cattle______ allowed graze here now. a. was b. were c. is d. are 11. None of this money______ right now. a. is b. are c. was d. were 12. None of them______ right now. a. is b. are c. was d. were 13. Every student ______ willing to join the picnic now. a. is b. are c. was d. were 14. The number of students______ in creasing now. a. are b. was c. were d. is 15. A number of students ______ playing table - tennis now. a. are b. was c. were d. is 16. Physics______ my favourite subject. a. are b. is c. was d. have been 17. They boy, with his two companions, ______ the cherry tree now. a. has split b. have split c. is slitting d. are splitting 18. The write and poet______ going to preside over this meeting a. are b. is c. have been going d. is to 19. Neither the mother nor the children______ aware of the danger. a. were b. was c. is d. has been 20. She told me that she ______ happy for what he______ a. is feeling/ did b. was feeling/ had done c. feels/ did d. has felt/ has been going