解析：　由下文的was alone可推测Daves先生没有"孩子(children)"。

　　答案：　C

　　4．A.strange B．ill

　　C．weak D．lost

　　解析：　由下文的John took Mr Daves fishing with him every time he went可推测，Daves先生失去妻子后，加上没有孩子，一个人很孤独，"不知所措(lost)"。

　　答案：　D

　　5．A.energetic B．young

　　C．popular D．confident

　　解析：　根据but可知此处的内容与Mr Daves was 80 years old是转折关系，再根据空后的内容never tired of being with John可知选"energetic(精力充沛的)"。

　　答案：　A

　　6．A.speech B．mind

　　C．balance D．sight

　　解析：　由下文的Unable to communicate可知，中风导致Daves先生不能说话了。

　　答案：　A

　　7．A.hear B．walk

　　C．see D．exercise

　　解析：　由上文的couldn't move his right side可知，此处指Daves先生不能"行走(walk)"。

　　答案：　B

　　8．A.happy B．surprised

　　C．sorry D．lucky

　　解析：　由上文的began to suffer from depression可知，John同情Daves先生。

　　答案：　C

　　9．A.information B．instruction

　　C．explanation D．permission

　　解析：　由下文的from the nursing home to take Mr Daves out for a ride可推测，此处指John获得疗养院的"允许(permission)"。

答案：　D