小品(我的中国梦):主谓一致里, A but B; A besides B, 和A except B的谓语是看A还是B?

主谓一致里, A but B; A besides B, 和A except B的谓语是看A还是B? ?(there b e) much homework today?but ?(there be) a lot of homework today? I would be 30 but I have sick a year I would be 30 but I have sick a year. 谁能帮忙解释一下：my set of keys____old,but your keys are new. A, am B.is C.are D.be,为什么选B a police officer had a brother ,but the brother had no brother.how could that be? a police officer had a brother,but the brother had no brother.how could that be? A police officer has a brother，but the brother does not have a brother. How could that be？ |a|+|b-a|-|c-a|-|a+b| there ( ) to be a knife and a fork on the table. A.seems B.seem