I want to explain my position: I don't think that phones in class can make us less concentrate and I have some examples to prove that. First of all, you need to have some useful materials that not always in touch, like internet-resources or online quizzes. On the other hand, we can distract more often on our messages without even understanding this. But, in my humble opinion, phone allows me to always be on the wave, if I haven't understand something by teacher's words, I can search it and find the right explain. Obviously, our phones make us to be more lazy, because we can find all answers here. To sum up, I said 2 pros and cons and the final point of me will be the following: phones - are generation C best friends, and it makes us defenseless against the world, we can't predict our relation and go deeper in that tech-sphere. But, in conclusion, phones are our air, our connection link to that world, we study by online system and always must be prepared for the emergency situation. So, I think, that phones should be in class.
If he didn’t do anything, he might have remained the same, not rich
2)I think, she might have passed her exams, but didn’t try to pass, so that was the reason.
She can’t have passed her exams, i already have heard that she failed.
3)His parents must have been not in the mood.
Ben might have go out with his friends, if his parents let him
4)I thought that he can’t have been got into an accident, because he is a very careful driver. He must have been drunk.
5)Gemma might have won, but she was tired. She must have got some problems with her sleep
6)Jamie can’t have been at the school, he was watching football matches at home. Jamie must have been angry after the match
7)Sarah might have been obese if she didn’t pull herself together
She must have been healthy, if the she’s really fit
8)She can’t have spoken French, because she has learned English, not French
She must have speak english fluently.