Question

There ____________ a party at the club house.There ____________ hundreds of people at the park.

Answer 1

There is a party at the club house. There are hundreds of people at the park.

Step-by-step explanation:

When the noun is singular like in the first sentence (a party) you have to use "is". When the noun is in plural like in the second sentence (hundreds of people) you have to use "are".