13.你将听到三篇材料,每篇材料读两遍.听第一篇材料,回答第11-12小题 11.How long have Paul and Tom been friends? A.For about four months. B.For less than two years. C.For more than three years. 12.Why does Paul think Tom is helpful? A.Because Tom always helps old people. B.Because Tom is happy to help him with his English studies. C.Because Tom helps the teachers a lot.