下列各句中，表达得体的一句是（ ）

When he realized the police had seen him, the man ______ the exit as quickly as possible.

pains-taking efforts, he eventually concluded that the principle he stuck _______ true.

(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

still sleeping when the fire ,and then it spread quickly