The boy was so______ on his stamp collection that he did not hear my footsteps.

A．She is trying to "cure" herself on raw vegetables.
B．She is taking nothing but vegetables and nuts.
C．She is spending all day walking about here.
D．She eats some raw and fresh provided food.

A．The speaker made a lot of money when working at the age of 18.
B．The speaker rode the tide of the technology wave till it broke.
C．The speaker bad the choice to work as a network administrator.
D．The speaker took full advantage of his high computer literacy.