Question

There are a lot of people here,.....?  

A: are they    B:aren't they     C:are there      D: aren't there

And why you choose that answer

Answer 1

D, and ONLY D!

The rule with tag questions is that if the first part is positive, the tag is negative and vice versa. There are some exceptions but they are not relevant here.

In your sentence, "There are a lot of people here,.....?" the answer "aren't there?" makes sense as a correct tag because you need a negative tag (the first part, are, is positive) plus the "there is/are" structure is used in the sentence, which means that it needs to be used in the tag and NOT the personal pronoun "they".

Answer 2

Aren't there

Answer 3

Are there

Answer 4

aren't they (It is a tag question and it should be negative.)

Answer 5

B- aren't they