连线题。

①What did you do last weekend? ____    A. I am singing and dancing.

②What are you doing? ____            B. It was great.

③Did Amy cook this morning? ____      C. I washed my clothes.

④Do you like sports? ____              D. No, she didn't.

⑤How was your weekend? ____          E. Yes, I do.

下列命题是假命题的是（　　）

若实数x，y满足$\left\{\begin{array}{c}x+y-1\ge 0\\ x-y-2\le 0\\ y\le 1\end{array}\right.$，则z=﹣$\frac{1}{3}$x+y的最小值为____