祖母绿的最优颜色是（）。
参考答案：绿色微带蓝色
早晨，太阳从（ ）方升起，傍晚，太阳从（ ）方落下。
Nowadays some parents regret not ______ more time with their kids when they were young.
A．to spend
B．spending
C．spend
D．being spent
