Question 23: Find mistakes and correct The team leader demanded from his team members a serious attitude towards work, the spirit, and that they work hard
Parallel structure: A or/but/and B then A and B must be congruent and congruent.
Need the noun form of the phrase “that they work hard” to go with the previous nouns “attitude” and “spirit”.
Edit: that they work hard=> hard work
The team leader requires his team members to have a serious attitude towards work, good teamwork and hard work.