the old man must have （）mad

A gone D driven

两个都有发疯的意思
为什么选A 不选D

用driven，要写成
The old man must have been driven mad.
gone是old man主动变疯，driven是被逼疯的意思，所以要用被动语态才行。

drive用做主动的话要写成
Someone must have driven the old man mad.

go 是连系动词，后面一般接形容词，而mad 是形容词，drive不是连系动词

drive crazy是一个固定词组 go mad 是一个词组

 haste the day - mad man you said it yourself to convalesce from empty sorrow, someone had to squeal to drive to the bottom you said "i know." i know it's not your fault like wire around your bones and you were never numb, i take it i'm a mad man, but i would never squeal i never said it was no good the innocent will rest in the peace they've been given paintings will sleep on the floor build walls of lonely dreams, as beauty fades i can't take this anymore! lock yourself up like a bird in a cage, you sing but no one ever listens how much were you paid to sell out the madman? like a scientist or a master of design i knew exactly what i was doing and i heard of your disease and shots of penicillin barely kept you alive the innocent will rest in the peace they've been given paintings will sleep on the floor build walls of lonely dreams, as beauty fades i can't take this anymore! i am the clone i dwell in silence i am the clone i dwell in silence i am the clone i dwell in silence i am the clone i dwell in silence the innocent will rest in the peace they've been given paintings will sleep on the floor build walls of lonely dreams, as beauty fades i can't take this anymore! the innocent will rest in the peace they've been given paintings will sleep on the floor build walls of lonely dreams, as beauty fades i can't take this anymore!

gone --> go , 变成 那老头肯定是疯了，gone相当于汉语这句话的 “了” driven...... 压根不沾边

go mad 是固定词组 v. 发疯 例句: Hearing this news, his happy to go mad. 听到这个消息，他高兴得发狂。 He prepares to go mad with fixed rule and method. 他准备对死板的规则与方式大闹一番。 If this pain doesn't go away soon, shall go mad! 要是疼痛不马上减轻，我会痛得发疯的！ 如果选D的话,则应该使用被动语态,即:have (been driven to )mad.