A If the students in South Korea don't study hard, they won’t get a place in one of the country's top universities.
B If the students in South Korea don't study hard, they weren't getting a place in one of the country's top universities.
C If the students in South Korea don't study hard, they wouldn't get a place in one of the country's top universities.
D If the students in South Korea don't study hard, they hadn’t got a place in one of the country's top universities.
E If the students in South Korea don't study hard, they didn't get a place in one of the country's top universities.