Question

Which sentence does not have an error in subject and verb agreement? A. Isn't your mother and your grandmother making you your own quilt? B. That dog and cat of yours was making us laugh that day! C. Are you and Gordon coming to the meeting on Saturday? D. Have another topic or a different thesis statement occurred to you?

Answer 1

B is incorrect. It's "That dog amd cat of yours WERE making us laugh that day".

Answer 2

The correct answer is C, 'Are you and Gordon coming to the meeting on Saturday?' It is the only sentence which is correctly written. A should say: 'Aren't your mother....'. B should say: 'That dog and cat of yours were making...' And D: 'Has another topic...'.
So they are all incorrect and contain a mistake, whereas C doesn't have an errr in subject and verb agreement.