633.There were many talented actors out there just waiting ______.
A.to discover
B.to be discovered
C.discovered
D.being discovered
634.With Father's Day around the corner,I have taken some money out of the bank _______ presents for my dad.
A.buy
B.to buy
C.buying
D.to have bought
633.答案是B;演员有待于被发现，故用不定式的被动语态。
634.答案是B;不定式表示目的。
