1 . ---What are you going to do with the flaw in the vase?
---I can either send a new one to you by express mail or _____ compensate you at a reasonable price.

A．artificially

B．accordingly

C．alternatively

D．consistently

2 . Father's love for their kids seems to be a bit strict and tough; ______, mother's love seems to be loving and caring.

A．anyway	B．meanwhile
C．moreover	D．eventually

3 . Though scientists get closer to understanding why we age， the reason for different aging rates among individuals remains only __________ understood．

A．concretely	B．thoroughly
C．vaguely	D．flexible