21.A.place B.amount C.number D.quantity
54.A.before B.since C.until D.after
53.A.come across B.come about C.come up D.broadcast
52.A.reading B.quiet hour C.activity D.programme
51.A.form B.kind C.method D.step
50.A.Writing B.Skill C.Speaking D.Listening
49.A.yet B.still C.even D.just
48.A.Professors B.Scientists C.Parents D.Educators
47.A.a fine poem B.a good book C.a quiet hour D.a composition
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