根据所给词的适当形式填空。【小题1】90% of the class enjoyed themselves (he) during the winter holiday.【小题2】

根据所给词的适当形式填空。
【小题1】90% of the class enjoyed themselves  (he) during the winter holiday.
【小题2】It isimpossible  (possible)for me to design the poster without your help.
【小题3】The police were searching  (search) the robber at that time last night.
【小题4】When I got to the theater, I realized that I had left  (leave) the ticket at home.
【小题5】December is the twelfth  (twelve) month of a year.
【小题6】You'd better plan your free time wisely (wise). Don't play too many puter games.
【小题7】——What do your father and uncle do?
——They are salesmen  (salesman) and they sell all kinds of robots.
【小题8】——I want to teach in the western areas.
——Well, teachers are needed  very much there. (need )
【小题9】Look! There is a new washing  (wash) machine near the window.
【小题10】My cousin refused to keep  (keep) secrets for me.