33.You can't imagine what difficulty we had ______ home in the snowstorm.[2007 辽宁卷]A.walked B.walk C.to walk D.walking为什么选D?

x��P�JA��VB���.�Qy�""&wt�tVvG/�������� �н�������-�bbkt ��7����O-g�ieǨ@�%�� �b�u�@#�<�U��6i�/�F ��t5l�fI�]M�� �x��p^�6��r�-� ��\Z�}����l\oe��3�wv$�/