Here are possible types of questions based on each given sentence:
Sentence 1: The children are swimming in the river.
a) General Question: Are the children swimming in the river?
b) Alternative Question: Are the children swimming in the river or playing on the shore?
c) Disjunctive Question: The children are swimming in the river, aren't they?
d) Special Question: Where are the children swimming?
e) Question to the Subject: Who is swimming in the river?
Sentence 2: The work can be done in two weeks.
a) General Question: Can the work be done in two weeks?
b) Alternative Question: Can the work be done in two weeks or three weeks?
c) Disjunctive Question: The work can be done in two weeks, can't it?
d) Special Question: In how many weeks can the work be done?
e) Question to the Subject: What can be done in two weeks?
Sentence 3: You have to write letters.
a) General Question: Do you have to write letters?
b) Alternative Question: Do you have to write letters or emails?
c) Disjunctive Question: You have to write letters, don’t you?
d) Special Question: What do you have to write?
e) Question to the Subject: Who has to write letters?
Sentence 4: There will be a new service station here.
a) General Question: Will there be a new service station here?
b) Alternative Question: Will there be a new service station here or a new convenience store?
c) Disjunctive Question: There will be a new service station here, won’t there?
d) Special Question: What will be here?
e) Question to the Subject: What will there be here?
Sentence 5: They lay in the sun for half an hour.
a) General Question: Did they lay in the sun for half an hour?
b) Alternative Question: Did they lay in the sun for half an hour or go inside?
c) Disjunctive Question: They lay in the sun for half an hour, didn’t they?
d) Special Question: How long did they lay in the sun?
e) Question to the Subject: Who lay in the sun for half an hour?
Sentence 6: I have some pets at home.
a) General Question: Do you have some pets at home?
b) Alternative Question: Do you have some pets at home or just plants?
c) Disjunctive Question: You have some pets at home, don’t you?
d) Special Question: What do you have at home?
e) Question to the Subject: Who has some pets at home?
Sentence 7: She did the work nicely last week.
a) General Question: Did she do the work nicely last week?
b) Alternative Question: Did she do the work nicely last week or poorly?
c) Disjunctive Question: She did the work nicely last week, didn’t she?
d) Special Question: How did she do the work last week?
e) Question to the Subject: Who did the work nicely last week?
Sentence 8: You'll get a nice present for your birthday.
a) General Question: Will you get a nice present for your birthday?
b) Alternative Question: Will you get a nice present for your birthday or just a card?
c) Disjunctive Question: You’ll get a nice present for your birthday, won’t you?
d) Special Question: What will you get for your birthday?
e) Question to the Subject: Who will get a nice present for their birthday?
Sentence 9: He is driving a new Ford today.
a) General Question: Is he driving a new Ford today?
b) Alternative Question: Is he driving a new Ford today or a used Toyota?
c) Disjunctive Question: He is driving a new Ford today, isn’t he?
d) Special Question: What is he driving today?
e) Question to the Subject: Who is driving a new Ford today?
Sentence 10: The telegram was brought by a stranger.
a) General Question: Was the telegram brought by a stranger?
b) Alternative Question: Was the telegram brought by a stranger or a friend?
c) Disjunctive Question: The telegram was brought by a stranger, wasn’t it?
d) Special Question: Who brought the telegram?
e) Question to the Subject: What was brought by a stranger?