could you tell me ________?

could you tell me ________?
sorry ,I have no idea
A.when does the History Museum open
B.when the History Museum opens
C.when did the History Museum open
how did you spend your holiday in Dalia
My family enjoyed _____.We enjoyed _____on the beach
A.ourselves ,walking B.us ,to walk C.themselves ,walking
Lily ,you are so special that you're different from other girls
Everyone in the world is different ,So just ____yourself It's the best way of life
A.enjoy B.make C.be