55.A.challenging B.different C.dangerous D.strange
54.A.worthless B.thoughtless C.hopeless D.helpless
53.A.At B.During C.On D.With
52.A.discussion B.argument C.disagreement D.agreement
51.A.spirit B.intention C.action D.attempt
50.A.believe B.protect C.treat D.receive
49.A.looked up B.went up C.took up D.showed up
48.A.upset B..frightened C.guilty D.ashamed
47.A.patiently B.eagerly C.successfully D.skillfully