It is an American custom when _____frien
题型:选择题
问题:
It is an American custom when _____ friends to telephone ahead of time to tell them you are coming. [ ]
A. visit
B. visiting
C. to visit
D. visited
It is an American custom when _____ friends to telephone ahead of time to tell them you are coming. [ ]
A. visit
B. visiting
C. to visit
D. visited