根据句意及首字母提示填单词，使句意完整，请注意单词的正确形式。
小题1:Tom often r_________ .his bike to go to the zoo.
小题2:Some students are playing soccer on their school p_________.
小题3:—Dou you think English is easy?
—No. I think it’s a little d_________ .
小题4:We can’t see the ball because it is b ________ the door.
小题5:It’s about 130 k_________ away from Beijing to Tianjin.
