题目

根据句意及汉语或首字母提示写单词，完成句子。【1】There are three ________（蜡烛）on the birthday cake.【2】People often eat ________（饺子）at the Spring Festival in China.【3】How ________（幸运的）they are to have such a good teacher!【4】At our restaurant, we have some great ________（特色菜）.【5】People in some countries eat many ________（土豆）as their main food.【6】He often o________ tomato soup in the restaurant.【7】Close the window or the wind will b________ everything of my desk.【8】You can travel around the w________ on符合以下三个条件：①在（0，π2）上递减；②以2π为周期；③是奇函数．这样的函数是（　　）A．y=sinxB．y=-sinxC．y=cos2xD．y=cosx2