Thenewdiscovery_______beofgreatservicetomankind.
A、isboundtoA
be bound to：注定要，一定会。本题中主语是 The new discovery ，所以谓语动词要用is。句意：这项新发现对于人类必定大有用处。
Theypreferto_______therestofthemorningwalkinginthegarden.
It is no use arguing _______ the plan because it has been rejected.
It rained hard yesterday, ______ prevented me from going to the park.
Aftermonthsofvoyage,Columbusarrivedin______laterprovedtobeanewcontinent.
The book fair has received a positive ________ from readers.
