根据下列句子及所给汉语注释，写出空缺处各单词的正确形式(每空只写一词)
【小题1】 These colorful (气球)make the garden more beautiful than usual.
【小题2】Customs officers examined all (行李) at the airport.
【小题3】You should think twice,but not jump at a (结论).
【小题4】 (非洲)is the second largest continent in the world.
【小题5】They like movies so they go to the (电影院) almost twice a week.
【小题6】On hearing the story,they burst into (笑声).
【小题7】He promised that he would be back on (星期四).
【小题8】They took (拥有) of the house as their own.
【小题9】He lay on his (胃) secretly to watch insects fighting.
【小题10】To tell you the (真相),I don’t agree with you.
（2014?锦州二模）物块A、B的质量分别为2m和3m，用轻弹簧连接后放在光滑的水平面上，对B施加向右的水平拉力F，稳定后A、B相对静止在水平面上运动，此时弹簧长度为l1；若撤去拉力F，换成大小仍为F的水平推力向右推A，稳定后A、B相对静止在水平面上运动，弹簧长度为l2，则下列判断正确的是（ ）
，则
的取值范围是 ．
