The old man() his son for three yearsa.has seenb.has vistedc.has leftd.hasn't seen

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The old man() his  son for three yearsa.has seenb.has vistedc.has leftd.hasn't seen

The old man() his son for three yearsa.has seenb.has vistedc.has leftd.hasn't seen
The old man() his son for three years
a.has seen
b.has visted
c.has left
d.hasn't seen

The old man() his son for three yearsa.has seenb.has vistedc.has leftd.hasn't seen
D
因为句中有FOR,所以用现在完成时,VISIT,LEAVE都是瞬间动词,按句意来说是不能选的.
A和D里面,看句子就知道选D了.这个老人已经3年没看到他的儿子了

The old man hasn't seem his son for three years

D

The old man hasn't seen his son for three years.^^

d

d.hasn't seen

d 表示一段时间,那应该用完成时,从句子的含义上看应该是这段时间没看到孩子,用否定的