1.A。由第二行的He was travelling along可知。
20.A.was saved B.ran away C.died D.left
19.A.story B.message C.lie D.truth
18.A.first B.last C.right D.honest
17.A.breaking B.waving C.knocking D.drying
16.A.worried B.surprised C.moving D.satisfied
15.A.someone B.nobody C.the father D.the police
14.A.wait B.enter C.stop D.march
13.A.when B.until C.although D.since
12.A.picked up B.searched for C.taken away D.brought back