把词语连成一句话写下来。  
1．我们    学习    认真  要 
                                                                   
2．父母  打扫    在  卫生 
                                                                   
3．阳台    阳光    上    照到了 
                                                                   
4．收了    铺到    床上    妈妈    棉被