Как правильно употребить have, been, to ?

Question

Вот есть пара предложений и вариантов, что и где будет правильным, и почему? 
У меня свои предположения, но хотелось бы именно объяснений почему 
 
1. Unions and legislators in many communities continue ...for always limiting exposure to video screens 
to push 
to have been pushed 
to be pushed 
 
2. ..unhealthy side effects he increased distance from the eyes to the screen and installed radiation protection devices (a glare reflector) 
to have been avoided 
to be avoded 
to avoid 
 
3. Most systems use account numbers and passwords ...acess to authorized users. 
to be restricted 
to have been restricted 
to restrict 
 
4. Unauthorized persons ...at obtaining any information and using it for tgeir own benefit. 
has proved to adept 
proves to have adept 
have proved to be adept 
 
5. People who expirience fear of computer .. that only a person with strong analytical and quantiative skills can use the machine 
seems to be suggested 
seem to suggest 
is seemed to have suggested

Диля Абдиева · Accepted Answer

1 to be pushed 
2. to avoid 
3. to restrict 
4.have proved to be adept 
5.seem to suggest

Серега Казак · Answer

ежели ты не в курсе - употреби безотказность ...)

Антон Суворов · Answer

1 - 3 
2 - 1 
3 - 3 
4 - 3 
5 - 2 
 
Х/з. Прсото просто по смыслу. В некоторых вариантах можно 2 ответа выбрать.