"Who did write an opera from the story of Tristan and Isolde?"

did write-->wrote

"Who was the first to run the marathon?"

the first man? the first person?

"From which animal is Cashmere obtained from?"

second 'from' should be removed.

Which city in America is known as " Sin City" ?

there should be no space between the first " and the S.

"How do you call the 30th aniversary of marriage?"

grammar

"Months have 31 or 30 days. How many months has 28 days?"

has-->have

"National animal of India?"

sentence fragment

Which of the following fiction character is not human?

"character" should be "characters". "fiction" should be "fictional" or rewrite the question to read "Which of the following characters in fiction is not human?"

Which weapon is inflicting cut injuries?

Should read "Which weapon inflicts cut injuries?".

I'm not entirely happy with the answers - "Sword" is correct, but "Shovel" is another option, and if used as a weapon a shovel might easily inflict cut injuries. But I guess that's for a different thread.

@ Johannes,

You have a point with that shovel, though... it's not considered as a weapon (lol)
E.

Uranophobia is fear of heaven. What other name this fobia has?

Second sentence should read "What other name does this phobia have?".

Anaphlyactic shock is can be a result of what?

Either "is" or "can be" but not both. I'd say the latter.

"Where does the Los Angeles Dodgers play?"

does-->do

I spotted this one as well but decided not to report it, because in the USA sports teams always seem take the singular, even when their names are plural. So they say "The Washington Redskins is playing at home this Thanksgiving". It seems odd to my ear, too, because in the UK it is pretty much the opposite - "Blackpool are playing at home to Wigan next week". So I would say that this is an allowable local variation, rather than plain wrong.

oh, good point, Johannes.

Arnold Schwarzenegger is the governor of which American state?

(California marked as correct)

Well no he isn't, he was replaced by Jerry Brown at the start of this year. This is a classic example of a question which should have had a "current date" attached to it. It is now simply incorrect, and needs to be amended or retired.

just change "is" to "was"

How long did Methuselah live?
666
363
121
969

Days? Minutes? Years? Centuries?

And Methuselah whom?

Because of the answer I think the question refers top the Biblical Methuselah, and it should be years, but how in **** does a question stated like that get approved?

From what has been made a giant mythical Jewish Golem?

"What was a giant mythical Jewish Golem made from?"

^ dangling preposition. how about:

From what was a giant mythical Jewish Golem made?