1. b
The dictionary is not with it's owner. So that the owner can't check the word.
2.a
I have mobile phone, so I can phone my parents.
3.b
I don't live inondon, so I can't visit The National Library every week.
Many-используется для тех вещей которые можно подсчитать например
They are many pencils on the table.
Much- Для тех которые нельзя подсчитать например
How much milk did you buy ?
A lot of(Очень много)- используется с обеими случаями <span />