题目

用括号内所给单词的适当形式填空。 1.The most ___________(tradition)way to celebrate birthdays in my family is to have a big meal at home. 2.He looked at me _________(sad)and said nothing. 3.The two __________(knife)are cheap.Would you like one? 4.It is ___________(snow)today.We can make a snowman. 5.I sincerely hope that you will be __________(success). 答案：1.traditional 2.sadly 3.knives 4.snowy 5.successful试列举两点事实说明硅的非金属性弱于碳。