1 a he got to appear once but he doesn't anymore
b he got to appear on the tv and he does it even now
2.a. they lived all the time on the island
b. They lived just for a period of time on the island
3.a. you sent in an unprecisely period of time in the morning
b. you sent emails in the entire period of time in the morning.
4.she once read it and says she likes it
5.she started to read it in the past and she still has connections with it /she is still reading it now and it leaves a good impression on her.
hope i helped!!!!