Well , i have many questions for you , please help me to solve these stuffs :
1. What is the difference between INTERFERE , INTERPOSE and INTERVENE ?
2. in a multiple choice exercise , I 'm confused when doing this sentence :
this ticket ... you to a free meal in our new restaurant .
a. confers b. entitles c. grants d . credits
the key is b . Why not the others ?
3. what is the difference between UNCONVINCING and INCONVINCIBLE ?
4. in a preposition exercise : Nobody seems to be ... control of those children . the key is IN . Why not UNDER . this is a popular preposition I often see next to the word " control"
5. in a tense exercise : It has been raining but it has stopped now . WHY IS HAS BEEN RAINING .i thought that present perfect continuous is used in the case the event is still continuous at the time the person says
6. in a" rewrite sentence so that it remains the same meaning " exercise :
because they had been told what English food is like , they decided not to spend their holiday in England .
rewrite: having been told what ...... WHY DON'T WE BEGIN THE SENTENCE WITH "TOLD" like this : Told what English food is like , they decided ....
7.what does TO BE ON THE PHONE mean ? Does this mean " have the phone " ?
8.the plane is flying ... our heads . What preposition do you think the gap is ? About or Above ? and the plane is flying ... the city . Is that the same preposition?
9. what is the difference between CLASSIC AND CLASSICAL ?
10.Can you tell me how to use the inversion like these ?
No sooner . . . than ; hardly / scarcely ... when ; Not until ; Only when ; Only by ;
do they have the compusory tense along with their structures ? can you give me the example?
11. rewrite the sentence : thank you very much . You brought me these new books
the key is : thank you very much for bringing me these new books .WHY NOT HAVING BROUGHT ?
12. in a correct the mistake exercise : Reading that letter , he understood everything . the mistake is READING . it is said that this mistake can be corrected like this : having read that letter ...
But in another book they have this similar sentence : Opening the letter , she found that it contained a cheque for 1000$ . And they explain that because : one action happening before another , so we have to use Opening , not having opened .WHAT IS RIGHT , WHAT IS WRONG ?
13. THE LAST QUESTION : WATER IS BOILED TO PURIFY but IT HAS TO BE SEEN TO BE BELIEVED . pay attention to TO PURIFY and TO BE BELIEVED . Why not to be purified or to believe ? I think that these sentences have the same structure , but why are the tenses different ?

Thanks for explaining to me . My friends and my teacher did explain those but I don't really understand .