英语1. __________ (smoke) is bad for our health. (健康)2．My favourite sport is __________. (swim)

1.smoking
2.swiming

1. smoking (smoke) is bad for our health. (健康)2．My favourite sport is swimming. (swim)

Smoking
swimming
这2个词的原形都是动词，要把它改成名词才符合意思，动词变名词就是在后面加ing

1、smoking is bad for our health.
2、2．My favourite sport is swimming

Smoking
swimming

To smoke(Smoking) swimming