Cathy, can you answer the door I ______ the room. –I’m coming, mum.

(2013·河北高三教学质量检测)Many people tried to leave the country, ________ there was much violence and a serious shortage of food supply

Do you know how many people ______ the big fire last week

She often _____ a bike to school.

______was it______ youdiscovered the secret of his—–Totally by chance .