2021_2022学年新教材高中英语UNIT2SPORTSANDFITNESSPeriod4作业含解析北师大版必修第一册

UNIT 2　 Period Four题组A　基础练(建议用时：10分钟)Ⅰ.单词拼写1．Smiling and laughing has actually been shown to _______