49.I can't be a(n)_____ that four jewelery stores were robbed in one night.

A.coincidence B.accident C.incident D.chance

50.Usually a child's behaviour is a _____ of his family environment.

A.recognition B.reflection C.return D.beyond

49.答案是A,

此题考查词汇，coincidence 巧合；accident 事故；incident 事件。

50.答案是B，

此题考查词汇，recognition 认可；reflection 反映。