1) I think my friend has never lied to me.
2) In my opinion BMW is one of the best cars.
3) I would prefer an apple than an orange.
4) As far as I'm concerned, my friend made a serious mistake.
5) I suppose you didn't make anything illegal.
6) I strongly believe that he did not break the chair.
7) Without a doubt he was telling the truth.
8) I do not think that it was him.
9) I'm afraid I don't agree with you.
10) The problem with your point of view is that you can't realize that he is an adult.
11) Start with a clean sheet would be best for you.
12) The reason why he didn't come is his daughter.
13) That's the reason why he didn't come.
14) Many people think apples better than orange.
15) Don't you think it would be better to go for a walk.
Вроде бы правильно, но можете перепроверить