Вообще an elephant. Но если предложении на подобие there some elephants over there (там несколько слонов), то some. Зависит от ситуации
1) This is a Mary's letter
2)Her familyis big
3) She lives in Australia
4) No
5) She like school garden with old fruit trees.
6)Her birthday is on the third of June.
He has been an actor since he was a boy.
Mark Twain lived in the USA.
<span>1 People marry for
different reasons. 2 Some people are afraid to go through life alone. 3 Some
(people) cannot live alone and need someone to look after them. 4 There are
those who simply need company. 5 Generally, people, especially women, want to
have children. 6 They believe, rightly or wrongly, that it is easier to raise
children in a family. 7 When both parents work, the family has more money to
spend on their children. 8 The family can afford to buy better food and clothes.
9 It shows that there are economic reasons for starting a family. 10 When
children grow up, they often provide care and support for their elderly
parents. 11 Old people are usually weak and often get sick. 12 They really need
their children’s help. 13 Old parents are happier in each other’s company because
old people love talking, and they always have someone to talk to. 14. When one
of the parents is taken to hospital, the other is supposed to visit the sick
one there. 15 Finally, when one of them goes to the better world, the remaining
relatives bury him, and plant flowers on his grave.16 None of these things
happen to those who have no family</span>
1. Dark clouds have covered the sky
Have dark clouds covered the sky?
Dark clouds have covered the sky, haven't they?
What have covered the sky?
Have dark clouds covered the sky or ground?
2.The pupils are writing a dictation.
Are the pupils writing a dictation?
The pupils are writing a dictation, aren't they?
What are the pupils writing?
Are the pupils writing a dictation or test.
3. He will have written a letter by 5 o'clock tomorrow.
Will he have written a letter by 5 o'clock tomorrow?
He will have written a letter by 5 o'clock tomorrow, won't he?
What he will have written by 5 o'clock tomorrow.
Will he have written a letter by 5 o'clock tomorrow or next week?
1. Темные облока закрыли небо
Темные облака покрывали небо?
Темные облака покрыли небо, не так ли?
Что накрыло небо?
Темные облака покрывали небо или землю?
2. Ученики пишут диктант.
Ученики пишут диктант?
Ученики пишут диктант, не так ли?
Что пишут ученики?
Пишут ли ученики диктант или тест?
3. К 5 часам завтра он напишет письмо.
Он напишет письмо завтра к 5 часам?
Завтра к 5 часам он напишет письмо, не так ли?
Что он напишет к 5 часам завтра.
Написал ли он письмо к 5 часам завтра или на следующей неделе?