（）是指以法定的书面形式订立的劳动合同。
参考答案：书面劳动合同
国家赔偿方式是以支付赔偿金为主，以返还财产和恢复原状为辅。 ( )
— I don't know _____ the piano.
— Don't worry. I can teach you. [ ]
A. how to play
B. when to play
C. how playing
D. when playing
