皮亚杰主要研究( )。
A．儿童的社会性发展 B．儿童的动作发展C．儿童的情绪发展 D．儿童认知的发展
参考答案：D
根据首字母提示，完成句子。
1. Kate likes movies and she wants to b_______ a movie star.
2. S_______ is the first day of a week.
3. —Is Richard Clayderman a m _______?
—Yes,he plays the piano very well.
4. Can you s_______me your family photo?
5. M _______ I know your address?
