-Whydidn'tyouwatchtheprogram"Wherearewegoing，Dad？"？-ItwasbecausesomethingwaswrongwiththewebTVtoomanyuserswerereceivingit．（）A.whichB.thatC.throughthatD.th
-Why didn't you watch the program"Where are we going，Dad？"？
-It was because something was wrong with the web TV _______ too many users were receiving it．（ ）
A. which
B. that
C. through that
D. through which
分析句子结构可知，空格之后为定语从句，先行词是the web TV，定语从句中应该是too many users were receiving it through the web TV，所以缺少through the web TV，用through which引导定语从句，因此D项符合语境，故选D．
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