问题补充:
Mary has been looking forward in the past 10 years tothe Great Wall.
A. payingavisitto
B. callon
C. beingonavisit
D. callat
答案:
(答案→)A. payingavisitto
B. callon
C. beingonavisit
D. callat
解析:句意:玛丽在过去的十年里一直盼望去长城看看。这里payavisitto+名词表示参观;callon拜访某人;beonavisit在参观中;callat sp拜访某地。这里look forward to+doing盼望做某事。故排除BD,根据句意故选A。