48.A.teacher B.principal C.role D.person
47.A.silence B.surprise C.cries D.paleness
46.A.pushed B.kicked C.forced D.knocked
45.A.noisiest B.biggest C.smallest D.youngest
44.A.might B.should C.would D.could
43.A.seldom B.hardly C.never D.often
42.A.window B.door C.gap D.hole
41.A.experienced B.heard C.seen D.punished
40.A.problem B.fault C.reason D.lookout
39.A.other than B.or rather C.worse still D.rather than