问题补充:
To pay to see that movie seems foolish you can see it on television for free.
A. before
B. though
C. when
D. once
答案:
A. before
B. though
(答案→)C. when
D. once
解析:此处when意为:既然。before 在……之前;though虽然; once一旦。句意:既然你能在电视上免费看那部电影,你花钱看那部电影似乎很愚蠢。根据句意选C。