Climbing hills are/is good for your health.这句用are还是is,或者是别的

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Climbing hills are/is good for your health.这句用are还是is,或者是别的
Climbing hills are/is good for your health.这句用are还是is,或者是别的

Climbing hills are/is good for your health.这句用are还是is,或者是别的
is
Climbing hills作为整体看,作主语.

用is
v.+ing做主语,谓语动词永远用单数

is