He stopped his friends, beginning his story____, declaring his innocence(清白) [ ]

With so many tress and flowers _____ about, our school campus looks like a beautiful garden.

My father has a habit of jogging ___________ the river in front of my house for an hour in the morning.

___do you like best about Chinese food—-I like dumplings best.

Excuse me. Is there a bus to the Olympic Center— . You can take the No. 111 bus.