Lessons can be learned to face the future, ______ history cannot be changed.
103. _____ at the news, the girl said nothing but ______ into the chair and cry.
104. What do you think _____ to her? She is very angry now.
105. There is a new problem involved in the popularity of private cars _______ road conditions need to be improved.
106. The method ______ highly effective.
107. Put the painting over there. As we know, an oil painting looks better _______.