Какое правильно?
he reads book everyday
he reads books everyday​

1. If I play tennis every day, I will be in a good form.
2. If i was younger, I couldn't solve such problem as this one.
3. You will become cleverer, if you read these books.
4. They will be more succeful, if don't play videogames as much as they do.
5. If it rains, we won't walk with our friends.
6. If he didn't come there, they all could die.
7. If he didn't say that, she wouldn't hate him.
8. I will become a good drawer, if i begin studying art from now.
9. I could be a good student, if I work harder.
10. If i play videogames for a long time, maybe i will become a proffesional.

Here are some instructions for you, 
if it so happens that you are in the jungle: 
First of all, you should use mosquito repellent cream;  
Second, you should find a place, where you are going to stay.
Third, you should make а tent and a bed.
Then, you must look for some animal to kill or for some other edible things. 
After that you must make a fire for cooking food, keeping yourself warm and for keeping the wild animals away.
Note: to find water you should look for animals' paths and follow them: 
wild animal paths usually lead to some water sources.

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