①What he said ____ me a lot.(使…感兴趣)

②To be ____ , I'm not sure what to do.(诚实)

③I've ____ my new pen. I can't find it anywhere(丢失)

④I can ____ finish the work today.(容易)

⑤You'll miss the train ____ you get up early.(如果不)

（请将序号填入横线）①达瓦拿着粉擦擦着黑板；②卷笔刀削铅笔；③人走路鞋底与地面的摩擦；④足球在操场上滚动；⑤静止在斜面上的正方体木块与斜面之间的摩擦．