假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。作文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。 

删除：把多余的词用斜线〔\〕划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

      2).只允许修改10处，多者（从第11处起）不计分。

    Yesterday our club held an English speech contest, which theme was “Challenge Myself”. A large number of students attended to the contest and showed their wonderful performances. In the stage, though face great pressure, the speakers bravely overcame it and challenged them to achieve great success. Moreover, they impressed us deep with their unusual confidences and performances.

    Through such activity, we know a lot more about our students but we have gained much, such as self-confidence and bravery. Besides, our club was growing stronger.

如图是某同学所记录的一节历史课笔记（部分），这节课内容所反映的历史时期是（    ）