17．All the above children who had food poisoning are now out of danger，which is under further____．（　�。�
A．investigationB．controlC．treatmentD．discussion

分析 以上所有吃了有毒食物的孩子目前都脫離了危險，此事正在進(jìn)一步調(diào)查之中．

解答 答案：A．
investigation調(diào)查，審査；control控制；treatment處理，處置，討論；discussion 討論．本句含有兩個定語從句，who引導(dǎo)的限制性定語從句修飾先行詞All the above children，which引導(dǎo)的非限制性定語從句，先行詞為前面的整句話；由句意"此事正在進(jìn)一步調(diào)查之中"可知選A．

點(diǎn)評 對于名詞的辨析要分析不同名詞的含義，并結(jié)合句意及邏輯關(guān)系作出合理的選擇．

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