51.A.how well B.how long C.how many D.how much
50.A.books B.troubles C.words D.music
49.A.worried B.eager C.glad D.anxious
48.A.look B.read C.analyze D.digest
47.A.use B.disadvantage C.value D.importance
46.A.difficulty B.success C.achievement D.pleasure
45.A.therapy B.problems C.reading D.work
44.A.view B.care C.walk D.distance
43.A.broken B.discouraged C.refreshed D.awakened
42.A.found B.lost C.persuaded D.accepted