新概念英语的二册第四课多项选择题第二题 为什么不选d

新概念英语的二册第四课多项选择题第二题 为什么不选d
I have just received a letter from my brother,Tim.He is in Australia.He has been there for six months.Tim is an engineer.He is working for a big firm and he has already visited a great number of different places in Australia.He has just bought an Australian car and has gone to Alice Springs,a small town in the centre of Australia.He will soon visit Darwin.From there,he will fly to Perth.My brother has never been abroad before,so he is finding this trip very exciting.
题目是only one of these statements is true,which one b.It's the time Tim has ever been to another country d.Tim's brother has never been abroad before