12．It remains to be seen ______ Hillary Clinton will win the 2016　presidential race．（　�。�
A．whenB．whereC．howD．whether

分析 Hillary Clinton是否會贏得2016次總統(tǒng)競選，還有待觀察．

解答 答案：D
A．when 當(dāng)…時候； B．where 在 …的地方；   C．how 怎樣，如何； D．whether是否；固定表達(dá)"It remains to be seen whether…"意為：是否…還有待觀察；it在句中作形式主語，真正的主語是whether引導(dǎo)的從句；故選D

點評 本題考查了it作形式主語的用法．做本題時，需要了解固定結(jié)構(gòu)"It remains to be seen whether…"的意義及用法．

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