alone in the dark room, the little girl was so frightened as to cry loudly.

单项选择题This skirt was made your mother her own measure.

单项选择题With proper measures, the economy in China is beginning to again.

单项选择题—Is here—No, Bob is ill at home.

单项选择题It is on October 1,2009 that the Peoples Republic of China its 60th birthday.

单项选择题联结学习理论认为，学习就是在刺激和反应之间建立直接联结的过程，其中起重要作用的是()。