根据下列句子及所给汉语注释，写出空缺处各单词的正确形式，每空只写一词。
The old man often makes a lot of  _______ (错误) .
What about ________(闲谈) with me this  evening?
Being a volunteer at a hospital may be a good __________(经历) for him.
John is a good runners. He always runs  ____(快) in his class.
Tom can learn Chinese by ________(他自己).