How high is Mt. Everest?

It is 8,848 meters high.

How tall is Mt. Everest?
It is 8,848 meters tall.

(Are both questions and answers correct?)

1. How high Mt. Everest is!
Yes, it is.
Yes, it really is.
Yes, you are right.

Are the responses all right?
Would you let me know more suitable responses?

2. It is 8,488 m high.
3. It is 8,488 ms high.

(Are both correct?)

4. What a pretty girl she is!
5. How pretty a girl she is!
6. How pretty she is!

(Among the three, which one is not correct? Is #5 correct?)

7. She is so pretty a girl.
8. She is such a pretty girl.
(Are both grammatical?)

How high is Mt. Everest?

It is 8,848 meters high.

How tall is Mt. Everest?
It is 8,848 meters tall.

(Are both questions and answers correct?)
Both are correct, but the first is better than the second.

1. How high Mt. Everest is!
Yes, it is.
Yes, it really is.
Yes, you are right.

Are the responses all right?
Would you let me know more suitable responses?
Yes, all are fine. You could also respond, "It certainly is." or "It sure is!"

2. It is 8,488 m high.
3. It is 8,488 ms high.

(Are both correct?)
I have seen m as the abbreviation for meter or meters, but not ms.

4. What a pretty girl she is!
5. How pretty a girl she is!
6. How pretty she is!

(Among the three, which one is not correct? Is #5 correct?)
4 and 6 are best; 5 is awkward and not used.

7. She is so pretty a girl.
8. She is such a pretty girl.
(Are both grammatical?)
8 is find, but not 7.

Should be "fine" not "find"!!

1. Yes, all three responses are correct and convey the same information.

2. The correct answer is "It is 8,848 m high." The number "8,488" in the two options you provided is incorrect.

3. The correct answer is "It is 8,848 m high." The abbreviation "ms" in the second option is not appropriate for measuring height.

4. "What a pretty girl she is!" is grammatically correct and conveys the message. This sentence expresses admiration and emphasizes the speaker's opinion about the girl's beauty.

5. "How pretty a girl she is!" is also correct. It is a slightly rearranged version of the previous sentence but conveys the same meaning.

6. "How pretty she is!" is the simplest and most concise way of expressing the same idea. It doesn't include the structure of comparing or emphasizing the speaker's opinion, but it still conveys the message.

7. "She is so pretty a girl." is not grammatically correct. A more appropriate way to say this would be "She is such a pretty girl." This conveys the same meaning and is grammatically correct.

8. "She is such a pretty girl." is grammatically correct and conveys the intended meaning effectively.