Paying to see that movie seems foolishyou can see it on television for free.A. beforeB. t

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A. before
B. though
C. when
D. once
解析：选C。考查状语从句。句意: 当你可以在电视上免费看的时候, 花钱看那部电影看上去太傻了。when此处意为“既然”, 引导一个让步状语从句。
【变式训练】
Why does she steal things    she could easily afford to buy them?
A. when     B. while       C. unless      D. which
选A。考查状语从句。句意: 既然她能够容易地买得起那些东西, 她为什么偷呢? when此处意为“既然”, 引导让步状语从句。