Alguém sabe as respostas e pode me ajudar, por favor?Obrigada!

Pergunta 1

Which is the correct Tag Ending for the following sentence?
They have made a good decision, (1) _______________________?
Mark the right alternative:
a.
(1) haven’t they
b.
(1) do they
c.
(1) did they
d.
(1) have they
e.
(1) isn’t it



Pergunta 2

Mark the alternative that presents all sentences correctly written concerning the use of Tag Endings:
Mark the right alternative:
a.
(1) My grandparents are having their 50th wedding anniversary tomorrow, haven’t they?; (2) My nephew is learning how to play the piano, isn’t she?; (3) My father doesn’t like to watch soap operas, does he?; (4) My neighbor John is moving to another apartment downtown, isn’t he?; (5) She is a new student here, isn’t she?
b.
(1) You could stay longer with me, couldn’t you?; (2) We have made a great decision, haven’t they?; (3) She is answering all her e-mails now, isn’t she?; (4) He had gone away, hadn’t he?; (5) They shouldn’t go now, shouldn’t they?
c.
(1) They don’t know how to play the guitar, do they?; (2) She is sending her farmhouse, aren’t you?; (3) It has been years since we talked to each other, hasn’t it?; (4) My maid is cooking dinner now, isn’t she?; (5) The reporters are asking those people what happened, are they?
d.
(1) You didn’t do your English homework, did you?; (2) Her sister went to school by bus yesterday, didn’t she?; (3) They shouldn’t come so late today, should they?; (4) You are traveling this afternoon, aren’t you?; (5) It is raining a lot in California, isn’t it?
e.
(1) They were having dinner when you arrived, weren’t they?; (2) I should walk faster, shouldn’t you?; (3) Your parents are traveling abroad, weren’t they?; (4) Nobody can come in, can’t they?; (5) She is an engineer, is she?