根据句意和汉语注释,写出单词的正确形式。 小题1:Though my grandma is in her ___________ ( 九十), she does housework every day. 小题2:He is rich, he still lives a ______(简朴的)life than most people. 小题3:We don’t know whether the bicycles are the _____________( 推销员) 小题4:People need to buy tickets before _________(进入) the cinema.