I read through the old threads regarding there is and there are. I found the following guideline is correct. Your comments is highly appreciated. Thank you.
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There are a lot of people. (People/Things = countable, therefore ARE)
There are a lot of things to do.
There is a lot of food. (Food/Money = uncountable, therefore IS)
There is a lot of money in the drawer.
(If the nouns after "at lot of" is countable, we use "ARE" and if the nouns after. is uncountable, we use only "IS"