Complete the questions with do or does. 1) ___ this bus

1) Does this bus go to the shopping center? 2) Does this shop open on Sundays? 3) Does your sister work in that shoe shopamp; 4) Which supermarket do you usually shop at? 5) Do your parents like shopping there?

Do / does is the auxiliary verb of Present Indefinite. We use do for all persons singular and plural except the third person singular. We use does for the third person singular.

This bus, this shop your sister are in the third person singular. Thats why we use does with them. 

You is the second person, and your parents are the third person plural. Thats why we use do with them.