It is necessary for you to have a computer password.
You

have a computer password.
It isn't necessary to stay in the exam hall after you have completed the test.
You

to stay in the exam hall after you have completed the test.
I advise you to seek help if you are having problems understanding something.
You

seek help if you are having problems understanding something.
Nia is a very well-behaved child. I doubt that she was nasty to the other children.
Nia is a very well-behaved child. She

nasty to the other children.
Richard has the ability to solve maths problems very quickly.
Richard

solve maths problems very quickly.
Students are obliged to be on time for class.
Students

on time for class.

Tom, aka Thomas, is a short-haired cat of an obscure breed, with white paws and a light chest. The main character and the main villain of the series. Despite his obvious predation, it is Tom who most of all gets the first number. The main goal of Tom's life is to capture the harmful mouse Jerry. Secondary goals are: eat well, sleep well, and generally lead an idle lifestyle. In a number of episodes, the essence of Tom's heartfelt claims to a cute white cat is revealed. Tom has his own mattress basket and is a completely domestic cat.

Once upon a time I decided to walk with my friends in big scary castle. We stand near big black gate. But we are not afraid, we are brave. We went to the castle, and suddenly turn on the light, gate closed. And we saw big, cruel, angry ghost with vampire, zombie, witch, necromancer. They said that they want to kill us. From the sailing began to drip blood, next to our feet crawlings snakes and worms,back run shivers. And all villain ran to us. they jumped on my friends and broken their head, legs, arms, ate their ears, eyes. Suddenly I heared loud cry:''Wake up, you need go to school. And enough to look at the night thriller, please''