53.Where was Davy while Linda was looking for him? ________
A.Inside the station B.Outside the station
C.In the box D.Around the station
52.Why couldn’t Linda see Davy anywhere? Because _________.
A.she was busy reading. B.the station was big
C.the dog got out of the box D.the station was crowded
49.A.am able to B.can C.will be able to D.could
48.A.Other B.Others C.Another D.The others
47.A.easy B.important C.different D.difficult
46.A.that B.which C.who D.where
45.A.surprise B.surprising C.surprised D.surprises
44.A.luck B.lucky C.luckily D.unluckily
42.A.health B.healthy C.healthier D.healthiest