Q. How often do Mars and the Earth align?

-> Once every 26 months, the two planets align.

=>The two planets align once in every 26 months.=> This sentence is okay. This is another way of saying it.​

-이건 푸푸야. 사랑스러운 강아지야. 푸푸는 빨리 달릴 수 있어.

This is Pupu. It's a lovely puppy. Pupu can run very fast.

This is Pupu. She's a lovely puppy. She can run fast. => This sentence is okay. This is another way of saying it. 

-이건 코코야. 코코는 귀여운 고양이야. 코코는 파란 눈을 가지고 있어.

This is Coco. It's a cute cat. Coco have blue eyes.

This Coco. She's a pretty cat. She has blue eyes. => This sentence is okay. This is another way of saying it.

​

-이건 토토야. 토토는 좋은 거북이야. 토토는 물 속에서 걸을 수도 있어.

This is Toto. It's a good turtle. Toto can walk inside water.

This is Toto. He's a good turtle. He can walk under the water. => This sentence is okay. This is another way of saying it.​​