Grammar Test. Use the Present Perfect.
Write sentences. Use the Present Perfect. Например

Internet - a great invention of our time. If you think about it, even when people have had such opportunities for communication and exchange of information, as it is now? Could our grandparents to imagine that it will be possible at any time to contact with relatives living on another continent? Read any book, without going to the library, to buy goods without leaving home? See through the webcam that is happening in other parts of the world right now? To communicate in the "Twitter" with a foreign singer?
Like almost everything in our lives, the Internet can carry and use, and harm. They say there is a lot of anecdotal information. And the Internet teaches us to a sedentary lifestyle that would be unprofitable for health. 

Любопытно, Кит, Мастер, мастерство, блестящий, шлепнуть, фатально, на самом деле, Торпедо, хулиган ,подстава, чтобы выявить, будет обречен, признать, отказаться

Мне просто любопытно.
А сколько весит кит?
Он большой мастер
Она не любит мастерство.
Он очень блестящий
Нам нужно шлёпнуть эту муху
Что значит фатально
На самом деле я другая
Давай запустим Торпеду
Он самый ужасный хулиган
Это же подстава!
Я сделал это что бы выявить обман.
Джек будет обречён!
Признай это Алиса
Я вынуждена отказаться

I'm just curious.
What's the weight of a whale?
He is a great master
She doesn't like the skill.
It is very shiny
We need to slap this fly
What do you mean fatally
In fact, I another
Let's launch a Torpedo
He's the worst bully
It's a setup!
I did it to identify fraud.
Jack is doomed!
Admit it Alice
I have to pass