I think skydiving和to do是用is dangerous还是are dangerous

I think skydiving和to do是用is dangerous还是are dangerous Do you think( )there is dangerous? What do you think is the most dangerous way to travel and wh ( )( )( )animal do you think is the most dangerous I think snakes are more dangerous than _______. I think swimming is more dangerous than playing table tennis How t___________ it is to do such a dangerous thing! 是It is quite danger 还是 It is quite dangerous? 这些英语句子哪个是对的?what do you think is the world most dangerous an dangerous 到底是be dangerous for还是be dangerous fo which do you think is more dangerous ,riding a camel or ridi