The research results show that the earth goes a little faster ______it is closer to the sun.

(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.

The value of life lies not in        many days we live, but in ____ use we make of them.

(2013·辽宁大连双基测试)________ a man's age, he can reduce it several years by wearing a confident smile.

Many restaurant menus include the origins of adish, ____ it is prepared, what the main ingredients are, and which farms the ingredients come from.