I have some question from previous TOEFL® exams

[Mosiiniut]

Hi everybody, in order to prepare for the TOEFL test I was reviewing previous tests and came to some questions for which I could find no answer!!! I really need help ...
please those who have taken previous exams and others who have proficiency in english grammer help me.
thanks a lot, here are the questions:
(2003-8=Q7)
1- Living organisms contain more water _________ substance.
(A) than do any other
(B) does than any other
(C) other than do they any
(D) than they do any other

(2003-8=Q12)
2． At its center, the sun has a density of over a hundred times _________ and a temperature of
10 to 20 million degrees centigrade.
(A) that of water
(B) of water
(C) than that of water
(D) water

(2002-10 Q=40)
A mutation is result of a definite biochemical change in a gene that uses the offspring to vary in some characteristic from the parents

(2002-10 Q=35)
Orchid seeds take up to eighteen months to mature before they sprout, and the young plants may need another two years to reach at the flowering stage.

TOEFL listening discussions: A conversation between two students at their university cafeteria

[Gray]

1) Living organisms contain more water than they do any other substance.

2) At its center, the sun has a density of over a hundred times that of water and a temperature of 10 to 20 million degrees centigrade.
_________________
First lesson - English, not english. I, not i. ~A student of English

[Torsten]

[Esl_Expert]

Hello Mosiiniut,

My suggested solutions are in boldface type inside the quote. I agree with Torsten that to maximize your success on the TOEFL, you should focus not only on test preparation questions, but also on the way you write. Bad habits tend to die very hard, and the TOEFL is not a test of "chatroom English". ;)

[Mosiiniut]

Hi back
Thanks for your kind help and answers.
A question that still exist here for me is the answer to the first question. I chose (A) "than do any other " and don't understand why the correct answer is (D) which you have mentioned! Please Help me with further information if possible!
Thank you for your kind remarks about my style of writting,as a matter of fact it is not so bad that you think, I just wrote this way because it is supposed to be a Forum, but now I see that I am to write correctly all the time! Ok,I will try to do my best.

[Esl_Expert]

Hello Mosiiniut,

[Mahmed]

hi
i'm an english teacher and i like to get tofel
can you please tell me about costs and gives me some help

thank you

[Kalusam]

Hello Mahmed,
I can help you register for the TOEFL test online,It costs about $160 for the iBT or the pBT depending on your location.
If you are interested then E-mail me on infobizspot@gmail.com

[Vlaksmi]

Hi
I am new to this forum but the answers given here to questions are so good.I need to take TOEFL exam in another 30 days.I know that its all about Listening ,Speaking,Reading and Writing.I can spare one hour a day for preparation.will that be suffice? can i get a score of 1oo?i have learnt english as a second language for the last 10 years and i have taken Business English Course vantage(BEC) by Cambridge university.can you suggest me ways to crack TOEFL in short time.As far i am concerned i can crack reading and writing.speaking might be difficult for me.No idea about listening yet.
Looking forward for the relies from you
Thank You