He is not the only football fan in his family, so () his brother, sister, and his uncle.
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He is the only one of those boys who ( ) willing to help others.
A.is
B.are
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
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