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50．A．usual               B．unusual            C．informal              D．formal

49．A．unless              B．if                      C．a(chǎn)s long as            D．since

48．A．lives                B．customs            C．parties                 D．beliefs                 

47．A．OK                 B．sad                   C．a(chǎn)ngry                  D．well

46．A．a(chǎn)m feeling       B．feel                   C．felt                      D．was felt        

45．A．worse              B．luckier              C．better                  D．easier                  

44．A．look                B．notice               C．watch                  D．care

43．A．changing         B．buying              C．washing               D．making

42．A．mean              B．think                C．decide                 D．suggest

41．A．a(chǎn)fraid             B．happy               C．bad                     D．lucky