—What’s electricity?—It’s a form of energy _______ we use in our daily lives.
Her father often _______ to work on foot. But yesterday he ________ a bike.
--- _______ do you have piano lessons?--- Once a week.
--- How did you go home yesterday ?--- My father when he drove past my school .
I want to get __________ about Qinghua University yesterday.
--- How can I learn English well, Miss Huang ?--- You should try ________ English every day.