A．Applying for a credit card with a high limit.
B．Purchasing with credit cards at a young age.
C．Using one credit card at a time.
D．Learning through hands-on experience.

A．To be as environmentally-friendly as possible.
B．To be as beautiful as possible.
C．To be as cheap as possible.
D．To be as peaceful as possible.

A．The east-facing side
B．The west-facing side.
C．The north-facing side.
D．The south-facing side.