1.(1)A.Colleagues. B.Classmates. C.Schoolmates. D.Roommates. (2)A.He hasn't finished his paper. B.He has bought a lot of new clothes. C.He is going to help the woman. D.His ideas in the paper are very new. (3)A.Prof Li is strict with his students. B.Prof.Li has a lot of working experience. C.They need Prof Li's help on their thesis. D.They like Prof.Li's class. (4)A.Nervous. B.Proud. C.Anxious. D.Confident.