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I would like to ask whether this two sentences is grammatically correct:

"There are several characteristics inside athletes--presevering, healthy, enduring, etc."

"This activity aims to develop talented students in sport."

Besides, I am bewildered about how to consider the the subject verb agreement regarding some types of sentences. For example, for "none of our students has become doctor", shall we use "has become" or "have become", "doctor" or "doctors"
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alvinloI would like to ask whether this two sentences is grammatically correct:
I would like to ask whether these two sentences are grammatically correct:

alvinlo"There are several characteristics inside athletes--presevering, healthy, enduring, etc."
Athletes have several characteristics. They are persevering, ...

alvinlo"This activity aims to develop talented students in sport."
This activity aims to develop students' athletic skills. / This activity aims to develop students' skills in sports.

alvinlo For example, for "none of our students has become doctor", shall we use "has become" or "have become", "doctor" or "doctors"
None of our students has become a doctor.

CJ
Comments  
Students: Are you brave enough to let our tutors analyse your pronunciation?
How about"As a student, we all know that mastering grammar is vital for studying English?"
we is plural. You need students, like this:

As students, we all know ...

Emotion: smile

CJ