（ ） was Mary who picked up the wallet.
（A）He
（B）She
（C）They
（D）It
It was on the National Day （ ） she met with her separated sister.
（A）that
（B）where
（C）when
（D）which
It is not how much we do but how much love we put into what we do （ ） benefits our work most.
（A）who
（B）which
（C）that
（D）what
