A,went forward 目的是 to shake hands with his friends 再说，"friends" 是复数，只可能是 He 想和 朋友们(friends) shake hands, 不可能 同时和 friends shake hands. ))))))))----------------end-------------------((((((((((
我选B,英语中有一个动词短语：go (went) forward doing sth.当然也是上面两位所解释的，你明白了吗？
我选择B。 连贯性的动作“走向前和朋友打招呼”
b,两个动作属于同时进行 也是个人意见：）
A, 因为是连续的动作.
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