The question_______ you should take this medicine should be decided by your family doctor.
A．whyB．if C． whether D．that
C

試題分析：句意，你是否應(yīng)該吃藥這個問題應(yīng)該由你的家庭醫(yī)生來決定。通過分析句子結(jié)構(gòu)，其中包含一個同位語從句。if不能引導(dǎo)同位語從句；在同位語從句中that，whether不作成分，that無實際意義，whether表示“是否”。
點評：同位語從句是用以解釋說明某一名詞內(nèi)容的名詞，所以它總是跟在某一個名詞的后面。
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