根据句意和汉语提示写出单词，完成句子。
【小题1】It’s the ________ time that Mr. Smith has visited the Great Wall. (三)
【小题2】People are the creators of history and they are the real ________. (英雄)
【小题3】“Happiness is achieved ________ hard work,” is on everyone’s tips these days. (凭借)
【小题4】Our class teacher often ________ us to make full use of time during this important time. (建议)
【小题5】We’re ________ that our country now has the longest high-speed rail network in the world. (自豪)