单选!_____ great fun it is to surf the internet in our compute

单选!_____ great fun it is to surf the internet in our compute It's fun ___ the Internet in your spare time?A to surf B sur _____ great fun it is to fly in a balloon! It is _____ great fun to play in Disneyland. It is fun _ on the Internet in our spare time It is ____to surf the Internet. Is very popular now use it to surf the Internet为什么it后用to （ ）great fun it is to go to the amusement park in （ ）fine we But is it good for us to surf the Internet?用法对么? surf on the Internet 还是surf in the Internet It is fun to surf on a windy day. great fun it is to watch the show