题目

阅读短文，选择正确的答案。I am Tom. I'm ten years old. I am very afraid to cross the road（过马路）. When the light changes into green, I will go. I will stop at thered light. We can wait at the yellow light. We must obey（遵守）the traffic rules. （1） Tom is________ years old. A . ten B . nineC eight （2） Tom is afraid to________. A . Sing B . cross the road C . speak English （3） We will________ at the red light. A . go B . wait C . stop （4） We must obey the________. A . traffic rules B . music C . news从一个等腰三角形纸片的顶角出发，能将其剪成一个等腰三角形纸片和一个直角三角形纸片，则原等腰三角形纸片的底角等于 ．