599.Henry can't attend the party _____ at Tom's house at present because he is preparing tomorrow's presentation.
A.hold
B.to hold
C.to be held
D.being held
600.The judge made the final decision after listening to the opinions of each party _________.
A.involved
B.to be involved
C.involving
D.having involved
599.答案是D;由at present暗示，此刻正在举行。
600.答案是A;involved此处作定语修饰party，意为:有关的。
