Определите объем кислорода, который потребуется для сгорания 10 моль водорода.

3)What ____ the teacher doing? She is helping Aizhan with this exercise. 4)What ___ ___ like doing in your free time? I like playing football. 7)What __ your father do? He is doctor.He works in hospital. 8)What __ you __ at 5 oclock yesterday? I was watching TV. 9)How long ___ you ___ studying English? Ive been studying English for five years. 10)What ___ you ___ to do tonight? I`m going to do my homework.