He a student A isn't B aren't C am not​

1 A: Why don't you stop wasting you time and get on with your work?
B: Because I can't stand doing chores around the house!
2 A: I've beeng working all morning, and I've stopped to take a break. Do you want to have some coffee with me?
B: I'd love keeping tou company, but I have to leave.
3 A: I'm so sleepy ! i can hardly stay awake ! 
B: you should try to go to bed earlier.
4 A: let me help you hang out the washing.
B: thanks, i promise to help you with your chores, too !
5 A: are you still thinking about buying a new dishwasher ?
B: no, i've decided to call someone to fix the one i have.

In recent years, society is clearly divided into two camps - vegetarians and opponents of this lifestyle. Vegetarians - these are the people who refuse any food that has animal origin.
There are so many "pros" and "against" this way of life
First of all, it's great content in food intake of dietary fiber, which, in addition to saturation will help rid the body of harmful substances all contribute to the prevention of cancer and atherosclerosis.
Secondly, it is, of course, a huge content in the diet of vitamins and minerals, our organism.
The third advantage - it is high in potassium.
The fourth advantage of this diet - the most suitable for the body ratio of saturated and unsaturated fatty acids.
The fifth reason why it would be to switch to vegetarianism - is almost complete absence in plant foods bad cholesterol.
Before you decide to switch to vegetarianism, read the literature on this topic, see more about the pros and cons and are based on that decide whether you need it. Good luck!
And finally, the sixth plus - cardiovascular system of the body would be very grateful to you for this diet.
Very many diseases, such as cardiovascular system, diabetes, metabolic disorders, gout, vegetarians almost never occur. In addition, some celebrities were supporters of this way of eating, such as Leo Tolstoy and Albert Einstein.But vegetarianism, except advantages are, of course, disadvantages.
First, in plant foods contained almost no vitamin D and vitamin B12, which is necessary for the process of hematopoiesis and to support the nervous system.
Second, in plant foods lacks many amino acids required by the human body, especially during childhood.