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 skills ___good for our health A is B are climbing m____ is good for our health. Eating more vegatables good for our health.are 还是is ---- is good evercise.climbing hills is climbing the hill is Eating healthy food are good for our health这句话的be动词是用is还是are The sports are good for health 后面系动词为什么是 are 不是 is Exercise(exercis) is (are ) good for our health. swimming and running （） good for our health 用is还是are Eating vegetables and fruit (is还是are)good for our health Fruits （） good for my health.填is 还是 are?为什么 Fall is a good time for climbing hills 同义句转换 急用!