用适当的介词填空
1.Sheistakingthechildrenout()awalk.
2.Youcanchoosethebestone()them.
3.Jackbrokethechocolate()severalpieces.
4.Theretwobridges()theriver.
5.Hesits()hisdeskallday()hisheadhishands.Heisdeepinthough.
6.()thehelp()theteachers,thestudentshavemadegreatprogress()theirstudy.
三.用所给词的适当形式填空.
()therainstill(){fall},or()it(){stop}?Iwanttogoshoppingtoday.