18．_______ difficult the task is，we are determined to finish it in time．（　�。�
A．AsB．WheneverC．HoweverD．How

分析 不管這個(gè)任務(wù)多么艱難，我們決定及時(shí)完成任務(wù)．

解答 答案：C  根據(jù)句意，本句中含有讓步狀語從句，as表示"雖然"時(shí)，不位于句首，應(yīng)該是Difficult as the task is；    whenever無任何時(shí)，不符句意．  how 位于句首時(shí)，沒有讓步的含義，however在本句中表示"無論多么…"．所以本題選擇C．

點(diǎn)評(píng) 考查從屬連詞時(shí)要注意選項(xiàng)中的連詞的含義，根據(jù)句意作出正確選擇．

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