一组数据2，7，6，3，4，7的众数和中位数分别是（ ）
A：7和4.5
B：4和6
C：7和4
D：7和5
一元二次方程x2=2x的根是（ ）
- Junior high school days will be over _______ a week. How are you feeling?
- I'm trying to keep my cool because we've been together ________ three years.
