Thenewdiscovery_______beofgreatservicetomankind.
A
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。
Hewouldhavegivenyoumorehelp,ifhe________sobusy.
支持代孕的理由有
He blamed his poor performance_____jet lag.
It took me a month to get rid _______ the cough.
When you're_____ a crisis, it often helps to talk to someone.