补写出下列名篇名句中的空缺部分。

一次函数$y=-\frac{m}{n}x+\frac{1}{n}$的图象同时经过第一、三、四象限的必要但不充分条件是（   ）

在同一位置以相同的速率把三个小球分别沿水平、斜向上、斜向下方向抛出，不计空气阻力，则落在同一水平地面时的速度大小（   ）

句型转换 
(1)There are some vegetables for dinner. （改为否定句）
There ____ vegetables for dinner.
(2)How's the weather in Beijing. (同义句转换)
____ the weather____ in Beijing.
(3)The students are having an English class . （对画线部分提问）
____ are the students ____ ?
(4)Your brother has a great time playing computer games. (同义句转换)
Your brother has ____ computer games.
(5) No photos here. (同义句)
____  any photos here.