题干
It stopped ______ at noon today and we had a sunny afternoon.
A：rain
B：rained
C：raining
D：to rain
答案(点此获取答案解析）
C
It stopped ______ at noon today and we had a sunny afternoon.
A：rain
B：rained
C：raining
D：to rain
的中心为顶点，右焦点为焦点的抛物线方程是（ ）
