Написано русское предложение и 4 варианта как правильно его написать на английском. Помогите, пожалуйста!
1. Она не может понять, как он совершил ту ошибку.
А- She can't understand his having made that mistake.
Б-She can't understand he having made that mistake.
В-She can't understand he has making that mistake.
Г-She can't understand his made that mistake.
2. Пойду выпью стакан сока, пока мою машину моют.
А- I have a glass of juice within my car cleaned.
Б-I'll have a glass of juice if my car cleaned.
В-I'd have a glass of juice when my car was cleaned.
Г- I will have a glass of juice while my car is being cleaned.

1. Она не может понять, как он совершил ту ошибку.

А- She can't understand his having made that mistake.

2. Пойду выпью стакан сока, пока мою машину моют.

Г- I will have a glass of juice while my car is being cleaned.