根据短文内容回答下面的问题，每空一词。
My name is Dave. I have two good friends. On Saturdays we often go to see the animals in the zoo. Tom likes pandas because they’re kind of shy. He likes Ling Ling best. Ling Ling is three years old now. Tom often goes to see her. Mary likes to play with dolphins. There are two dolphins in the zoo. They’re friendly to people. My favorite animals are lions. I think they’re smart. But Mary doesn’t like them. She says lions are too scary. We have a little dog. Its name is Bargo. It’s black and white. Bargo often goes with us to the zoo. It’s cute. We all love it very much.
When do they often go to the zoo?
They go to the zoo ________ ________.
How old is Ling Ling?
She is__________ ___________ old.
Why does Mary like dolphins?
Because they’re ________  ________ people.
What kind of animal is Bargo?
Bargo is a __________. It’s ___________.