there's a lot of things为什么用there is单数不用there are?

there's a lot of things为什么用there is单数不用there are? there is a lot of traffic and pollution.为什么用is不用are There are a lot of things to () there are a lot of/There is a lot of? Is there a lot of furniture?后面有a lot of前面为什么要用be动词单数is而不用复数a There are a lot of people over there.为何用are不用is? There ____(is/are) a lot of food.为什么? there are\is a lot of . ------a lot of chairs.A there is B there are It is they are each other a lot of let's go is there there i there are a lot of things to do同义句? There are a lot of things to be done .