25．My friend showed me round the town, 　　　　was very kind of him.　

A. which　　　　 　　B. that　　　　 　　　C. where　　　　 　　D. it　

24. -----How did you find your visit to Mountain Tai, John ?

　 ----- _________.

A. Oh ,wonderful indeed.　　　　 B. I went there alone .

C. First by train and then by ship.　 D. A guide showed me the way .

23．It seems that living green is 　　　　　easy and affordable. A small step makes a big difference.

A. exactly　　　　 　　B. fortunately　　　　 C. surprisingly　　　 　　D. hardly