A．Leaving B．LeftC．Having left D．To be leftalone in the ……

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()。

单项选择题普通中小学教育的性质是()。

单项选择题最早提出经典性条件反射的人是()。

单项选择题平时我们所讲的举一反三、触类旁通、闻一知十等是典型的()形式。