我认为坐火车旅游更有趣I think it"s____ _____ _____by train我认为坐火车旅游有很趣I think it"s____ _____ _____by train

Question

我认为坐火车旅游更有趣I think it's____ _____ _____by train
我认为坐火车旅游有很趣I think it's____ _____ _____by train

Answer 1

I think it's (interesting / enjoyable / pleasant) (to) (travel) by train.
此句中,think 后接了一个由it 作形式主语的宾语从句,其真正的主语是后面的不定式短语 to travel by train,而形容词interesting / enjoyable / pleasant 是该从句的表语.