在“研究平抛物体运动”的实验中（如图1），通过描点画出平抛小球的运动轨迹．

根据句意及首字母提示，完成句子.
____ Now your plan is __________(clean ) the blackboard.
____ When someone knocked at the door, he _________(watch) TV.
____ I was busy preparing for my exam yesterday, so I couldn't help_________(do) some cleaning.
____ Is he used to _________ (get) up early?
____ Did you make a _________on the spring trip? (decide)

法律靠国家强制力保证实施。下列能体现这一观点的是（   ）

(　　)