17．It is reported that two schools，________ are being built in my hometown，will open next year．（　　）
A．they bothB．which bothC．both of themD．both of which

分析 據(jù)報(bào)道，正在我家鄉(xiāng)建的兩所學(xué)校，將明年投入使用．

解答 答案：D  句中含有非限制性定語從句，可以排除A和C，句中先行詞為two schools，從句中缺少主語，根據(jù)選項(xiàng)中的詞，which應(yīng)該在句中作both of的賓語，故選D．

點(diǎn)評 考查非限制性定語從句時(shí)，要分析先行詞以及從句中的句子成分．

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