5．The hottest continent，Africa has a lot of resources，______ are still undeveloped．（　�。�
A．many of themB．many of whomC．many of itD．many of which

分析 最熱的大洲---非洲有很多資源，大部分資源都沒(méi)有被開(kāi)發(fā)．

解答 答案：D
分析句子結(jié)構(gòu)，Africa has a lot of resources為主句，空白處句子為非限制性定語(yǔ)從句，缺少主語(yǔ)；先行詞為resources，指物，故用which．另外，定語(yǔ)從句引導(dǎo)詞which和whom前可以用限制詞修飾，如：many of/both/none of/+which/whom．本題需注意的是，如果是and連接兩個(gè)并列句，則選A．

點(diǎn)評(píng) 本題考查非限制性定語(yǔ)從句．考生需先對(duì)句子結(jié)構(gòu)進(jìn)行分析，判斷缺少什么成分，在結(jié)合先行詞做出判斷．

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