1. Jane and Mike are the same in score.

Question

Jane and Mike are the same in a score.
Jane and Mike are the same in the score.
(For example, Jane got 90 points. Mike also got 90 points.)

Which expression is correct?

2. How does the baby look?
It looks sleepy.
(Is the question or answer correct?)

3. Wow, it's a new beginning.
(What does 'it' mean?)

3-1. Yes, it's a new semester!
(Waht does 'it' mean?)

Answer 1

1. Jane and Mike are the same in score.
Jane and Mike are the same in a score.
Jane and Mike are the same in the score.
(For example, Jane got 90 points. Mike also got 90 points.)
Better pheasing is this: "Jane and Mike have the same score."

Which expression is correct?

2. How does the baby look?
It looks sleepy.
(Is the question or answer correct?)
It's fine, but it would be better if you said, "He looks sleepy" or "She looks sleepy."

3. Wow, it's a new beginning.
(What does 'it' mean?)

3-1. Yes, it's a new semester!
(Waht does 'it' mean?)

In both 3 and 4, "it" doesn't have an antecedent. There is simply a general reference to time -- maybe meaning today or this week.

Answer 2

"pheasing" ~~> should be "phrasing"!