When I got out of the car and walked about among them,

When I got out of the car and walked about among them, ____one old man who shook his head disapprovingly, they all began to cheer.

see that

except that

provided that

except for

答案及解析：本题考查非谓语D选项，句意：当我下车走在他们中间的时候，除了一个老头不满地摇了摇头，大家都开始欢呼。except for意为“除…以外”，后接名词，故D选项正确。A选项，see that意为“留意…;负责…;务必…”，故排除。B选项，except that意为“除去…之外”后接句子，故排除。C选项，provided that意为“倘若，在…条件下”，故排除。故正确答案为D 项。