用适当介词填空.

1.Canyouseethewordswritten________theblackboard?(in,on,by,with)

2.Sheistakingthechildrenout_______awalk.(in,on,for,by)

3.Youcanchoosethebestone________them.(in,on,among,by)

4.Jackbrokethechocolate_______severalpieces.(in,on,with,into)

5.Therearetwobridges______theriver.(in,on,with,into)

6.Thereisaslogan(标语)_______thewall.(on,in,over,above)

7.Hesits________hisdeskallday_______hishead_______hishands.Heisdeepinthought.(on,in,at,with)

8._______thehelp_______theteachers,thestudentshavemadegreatprogress_______theirstudy.(on,in,of,with)

9.Hewillbeback_______aminute.(on,in,for,by)

10.Theteacherisstanding_______theclass.(on,before,to,in)