已知椭圆$\frac{x^2}{2}+\frac{y^2}{m}=1$的焦点在$y$轴上，离心率为$\frac{1}{2}$，则$m$的值为（   ）

从方框中选择正确的单词并用其适当形式完成短文，使短文通顺、完整

   If you often have a cold, a headache or a sore back, there is something ____  with your health. ____  healthy food is good for your health. Tofu, milk, vegetables are healthy for you.

   Tofu is a kind of ____  Chinese food. We often eat it in China. Now more and more people in other____  think tofu is good for health too. They also like eating it.

     Milk is____  kind of healthy food. Every day you should ____ one or two glasses of milk. It can keep you strong. Vegetables are very____ , too. You should eat a____  of them. There are Vitamin(维生素) A, B, C, D, E and so on in them.

    As we know, it's important to eat healthy food. We must have the right kinds of food. We should also eat some pork, chicken and____ . We should eat more fruit and vegetables but ____ meat.

根据句意及首字母提示完成单词 
Do you like eating ice cream in s ____?
M ____  is not everything, but we must have it. 
Don't run when you see a dog.  It is d____. 
Miss Smith is a good teacher,  and she t____  us English.
As a reporter,  he works for a m____.

下列语句中，没有语病的一项是（   ）