My sister enjoys to take photographs of flowers in the spring.

• Sửa: My sister enjoys taking photographs of flowers in the spring.

It takes me about fifteen minutes going to school by bicycle.

• Sửa: It takes me about fifteen minutes to go to school by bicycle.

It's easy to find a job in the city than in the country.

• Sửa: It's easy to find a job in the city than it is in the country.

She prefers to sleep to going out at night.

• Sửa: She prefers to sleep rather than going out at night.