{01}It is a difficult problem for high school students they can properly use the Internet.
A.what
B.where
C.when
D.whether
解析: 试题分析:考查主语从句。句意:对于高中生来说,他们是否能正确的利用网络是一件很难的问题。句子中it 是形式主语,真正主语是whether引导的主语从句,根据句意得出选D项。 考点 : 考查主语从句 本题选D。 {02}-Jeffery seems to go without proper food and sleep for days. -Leave him alone.That"s________he reacts to a lost love.
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