Is this sentence correct?

I'm preparing for the IELT exam. But I do not know following sentence is correct.

I would be grateful if you could teach me.

1. British universities will accept students from abroad that they will develop the talents of diverse students.

1-1. British universities will accept students from abroad and they will develop the talents of diverse students.

1-2. British universities will accept students from abroad to develop students with diverse talents.

on condition that they passed the IELTS exam with a minimum 6.5 score.

on condition that they have passed the IELTS exam with a minimum 6.5 score.

on condition that they had passed the IELTS exam with a minimum 6.5 score.

whom passed the IELTS exam with a minimum 6.5 score.

2. Working for a large company can be a fulfilling experience if you can use your talent and ability.

: Is it o.k? if -> on condition that you can~

3. Most banks are happy to lend customers money on condition that they have successful businesses and to get the interest and principal back to banks.

4. The government will reduce income tax for an economic recovery

To get out of the long-term economic downturn

To get out of the long recession

if the economic does not recovery.

if the economic does not recovery for a long time.

5. The environmental situation will continue to worsen unless we can reduce our exhaust gas.

unless we (can) reduce our dependence on imported fossil fuels

6. There will always be long waiting lists at our hospitals Because there are many cold patients during the change of seasons.

7. Travelling helps you understand more about the world around you have not experienced before.

I would be grateful if you could teach me the details of the wrong part.

Thanks for your time

From Park