4.A.with B.by
C.without D.for
解析:选C 笼中鸟"不用(without)"做任何事就可以得到食物和水。
5.A.pet B.friend
C.owner D.toy
解析:选A 由下文的"who might ... him as a pet"可知,蝙蝠想成为小孩的"宠物(pet)"。
6.A.loved B.changed
C.formed D.finished
解析:选B 蝙蝠本是夜间活动的动物,根据下文的"He got up in the early morning to fly to parks"可知,蝙蝠"改变(changed)"了原有的生活习惯。
7.A.and B.but
C.or D.so
解析:选D 蝙蝠早上飞到公园是为了让小孩发现他,故此处选用so。
8.A.teach B.keep
C.sell D.buy
解析:选B 由"as a pet"可知,小孩也许会把蝙蝠当宠物来"饲养(keep)"。
9.A.brave B.big
C.busy D.attractive
解析:选D 由下文的"the children paid him little attention"可知,蝙蝠没有"吸引力(attractive)"。
10.A.cover B.save
C.improve D.forget
解析:选C 由下文的"He stuck lots of feathers (羽毛) to his body."可知,蝙蝠决定"改善(improve)"它的外表。
11.A.Usually B.Sadly
C.Luckily D.Hopelessly