Question: Most parents feel frightened when they learn that their child has a serious disease
Please fix the punctuation.
Fixed: [Most parents feel frightened when they learn that their child has a serious disease.]

Question: Many tours are easy to find Difficult around the Grossglockner
Please fix the punctuation.
Fixed: [Many tours are easy to find Difficult around the Grossglockner.]

Question: If you want to prevent a third party ad server from sending or reading cookies on your computer you must visit the companys web sites individually and optout
Please fix the punctuation.
Fixed: [If you want to prevent a third party ad server from sending or reading cookies on your computer, you must visit the company's web sites individually and opt-out.]

Question: A person who does not have a very strong desire to find out the truth will become tired of reading about the same things several times even though these repetitions are seen in different perspectives
Please fix the punctuation.
Fixed:
[A person who does not have a very strong desire to find out the truth will become tired of reading about the same things several times, even though these repetitions are seen in different perspectives.]