完形填空。

It's Saturday morning.1father, a very fat man，takes Ben to the zoo. Of course Ben is very glad. There are a lot of interesting and lovely 2 there. They go here and there. Ben 3 his dad many questions about animals. "4can a bird fly？""5 does a bear eat?" "Why can geese walk and swim? Why do they live on the ground and in the 6_?"

They come to see tigers. Ben gives some bread to 7, but they don't eat it. "Why 8 they eat bread?" "They only eat meat. They don't like 9 bread at all," his father says. "Really? Wow!" Ben 10his father's hand and runs. "Let's go, go, go quickly! I can't go home by myself after they eat you. "Ben's father smiles and says," I have a good son. Thank you, my son!"