We' 11 never give up our plan          happens．

A．however                 B．whatever           C．whenever              D．wherever

Boys and girls, __________ you choose to wear, your clothes should be clean.

________ you do, try Your best.

[　　]

He is eager to own ________ he saw.

[　　]

You may go to the 24-hour shop _____ you want

A．whenever            B．wherever             C．however                D．whatever