Помогите, заранее спасибо

XIV. Compose 20 sentences about the text, using modal verbs must, can, may, ought, might with the perfect infinitive:

Models: a) Judy's guardian must have (never) read her letters (должно быть, (не) читал) .

b) Judy could have bought some other things with her guardian's money (могла бы купить...) .

c) Judy's guardian might have seen Judy somewhere (он, возможно, видел ее...) .

d) Don't you think that Judy's guardian ought to have answered her letter (ему следовало бы ответить на ее письмо).

Dear Daddy Long-Legs,
You never answer any questions, you never show the slightest interest in anything I do. I haven't a doubt that you throw my letters into the waste-basket without reading them. Hereafter I shall write only about work.
My re-examinations in Latin and Geometry came last week. I passed them both and am now a Sophomore.
I came up a fortnight ago, sorry to leave the farm, but glad to see the campus again. It is pleasant to come back to something familiar, I am beginning to feel at home in college.
I am beginning chemistry, a most unusual study. I've never seen anything like it before. I am also taking logic. Also history of the whole world. Also plays of William Shakespeare. Also French.
I should rather have elected Economics than French, but I didn't dare, because I was afraid that unless I re-elected French, the Professor would not let me pass — as it was. I just managed to squeeze through the June examinations. But I will say that my high-school preparation was not very good.
And here is news for you. I have begun to be an author. A poem entitled "From my Tower" appears in the February "Monthly" — on the first page, which is a very great honour for a Freshman. My English instructor stopped me on my way out. of college last night, and said it was a charming piece of work except for the sixth line, which had too many feet.
But sometimes a dreadful fear comes over me that I'm not a genius.
Yours truly, Judy
(From "Daddy Long-Legs" by Jean Webster)