I am afraid I can’t return the book toyou before Friday——

He runs fastnobody can catch up with him.

utside the US continue to see the country as one of opportunities , and despite being in a tough economic position , research shows many young Americans would ________it as well.

下列各句中，划横线成语的使用恰当的一项是（ ）

(2013·高考天津卷)No one ________be more generous; he has a heart of gold.