it is 8 oclock 。对这句话提问,用特殊疑问句

----___ to see Mr.Mandy.My appointment is at 10 oclock.----You are on time for your appiontment.
A.I have come
B.I had come
C.I come
D.I came
选A,请帮我分析一下,

it was 4 oclock （） when the front doorbell rang，，为什么不能填that，要填when，，，不是看成强调句吗

if he will have not came here before 5 oclock,we will leave here early.
如果他5点之前还没到,那我们导师将先离开.这句话翻译有问题么?前一句用将来完成时,后一句用一般将来时,时态是这样么,求大侠详解.
有人能给出地道点的翻译么？

一篇阅读
Since
my
mother
wouldn‟t
get
home
until
four
o‟clock
,I
was
alone .
I
looked
around
the
kitchen a while ,but there was nothing I felt like eating.
All of a sudden I smelled smoke .It was like something bu
rning ,and that‟s what I thought it
was at first .But soon I knew it was more than that .It seemed that the smoke was coming up the
back stairs .I rushed out and found that clouds of it ,big black balls of it were rolling up past the
window.
I don‟t know if I was afraid or not .I don‟t remember,you know .For some reason I thought of
“Mr.Turner,A fire!A fire!”
“What ” he asked ,still with his eyes half
opened.
“A fire on the first floor .Call the fire department ” I shouted.
“Yes .Good boy.” Mr.Turner said as he did what I wanted him to.
“Everyone out of the place ” he asked ,”How about the
Ennis?”
“Mr.Ennis went out .” I said.
We were by her front door now ,and Mr.Turner stopped and shook the door and shouted .No
one answered .The smoke was had .It was even in the front hall.
We ran down outside to the back of the building ,waiting for the foremen ,and along came Mrs.
Ennis with a fu
ll hand of things she bought .“Our baby!” she cried.
Only at this time did I remember that Mrs.Ennis was a new grandmother.
1.The writer of the story looked around the kitchen ____________.
(A)and found nothing he felt like eating
(B)and waited for h
is mother until four o‟clock
(C)to see if there was fire in it
(D)to see if his mother was there
2.What did the writer think at first when he smelled smoke?
(A)Someone was making a fire
(B)Someone was cooking
(C)Something was burning
(D)A fire was going to grow up
3.From the story we know that Mr.Turner.________________ .
(A)made a fire to warm himself
(B)sleeps from morning till night
(C)broke into the front door
(D)liked to work at night
4.Who called the fire department?
(A)The writer
(B)Mr.Turner
(C)The good boy
(D)Mrs.Ennis
5.How many people were there in the house that was burning at that moment?
(A)Two
(B)Five
(C)Four
(D)Three

I didnt stop before 12 oclock 这句话用的before对吗?为什么老师说stop是点动词不能用before?

6.The next train to Bejing___here at 3'oclock
A is due B is due to C is due for
7.he gose to school by bike,and the ____takes haf an hour .
A trio B journey C voyage
9.He ___in the laboratory the whole morning
A has been working B working C has worked
11..Those cakes look nice.Can i have ___?
A one Bit C one cake
12 We need ___the machine
A repairing B to repair
13,When was the building____?
A.complete B completing C.completed .
14She was very concerned___her mother's ukkbess.
B about C with
15Who is responsible ___breaking the window?
A to C for
选择的理由

you must come home at 6 'oclock,下面的提问第二个对吗?
1：must you come home at 6 'oclock ?
2：Do you must come home at 6 'oclock ?

The job would require that ___in the office at 5 oclock
A).he were
B).he will be
C).he be
D).he has been
我知道选C,是省略了should.我的问题是为什么用would require?
为什么不直接说The job requires that he (should)be in the office at 5 oclock.有什么区别?用would repuire是什么意思?这样翻译出来又是什么意思
为什么句子不写成The job requires that he (should)be in the office at 5 oclock，而写成The job would require that he (should)be in the office at 5 oclock。这两个翻译出来意思上有什么区别么？