题目内容

He is the only one of those boys who ( ) willing to help others.

A.is
B.are

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Joan is one of those people who ( ) out of their way to be helpful.

A.go
B.goes

Living on that island for three months () an unforgettable experience for me.

A.was
B.were

Sometimes what appear to be problems ( ) easily solved.

A.are
B.is

To translate this into English () hard work.

A.need
B.needs