二元一次方程3x+2y=12在正整数范围内的解有（　　）

大文豪伏尔泰说过：“通向心灵的大陆是你的耳朵。”要了解别人就要学会倾听，如果我们想得到知心朋友，想处理好人际关系的话，必须锻炼自己倾听的才能。下列做法能锻炼我们倾听才能的有（   ）

①倾听他人讲话要有耐心，精神集中，神情专注               ②要对讲话人的观点经常进行批评，以示你在听

③倾听他人讲话时，要善于思考，取人之长，补己之短   ④在倾听的过程中，要经常与讲话人进行目光交流

观察蚯蚓、沙蚕和水蛭的图片，它们都有共同的特点，属于（　　）

    Today is Mike's surprise party. His parents are at home. They are making a ____ and some cookies. ____cookie has a letter. His parents don't ____ him about the party. The party ____ at 5：00. Lily comes to Mike's home before 4：00. She is ____.

    Mike is shopping for gifts. He needs gifts for everyone. At 4：30, he arrives home. How surprised he is！ ____of the people have a good time.