Choose the right variant. One and the same word should be

Choose the right variant. One and the same word should be used only once. Ответ запиши в виде композиции цифр и букв без пробелов и каких-или знаков препинания, числа должны идти по порядку. К примеру, 1а2d3c
1. _____ are you looking at me?
a) how many b) why c) who d) when e) where f) what
2. ____ is speaking on the phone?
a) how many b) why c) who d) when e) where f) what
3. ____ are they now?
a) how many b) why c) who d) when e) where f) what
4. ____ did Oleg do yesterday?
a) how many b) why c) who d) when e) where f) what
5. ____ lessons do you have every day?
a) how many b) why c) who d) when e) where f) what
6. ____ did Tom come back?
a) how many b) why c) who d) when e) where f) what