Rearrange the words.连词组句。

1. is, snowy, It  (.)                 

    ___________________________________________

2. have, I, dinner, my, family, with  (.) 

    ___________________________________________

3. go, I, to, o'clock, school, at, seven  (.)

    ___________________________________________

4. time, is, it, What  (?)              

    ___________________________________________

简述单件小批生产任务到达方式。