1．However，It was in war          they found their greatest use．（　�。�
A．whereB．whichC．howD．that

分析 然而，他們是在戰(zhàn)爭(zhēng)中發(fā)現(xiàn)的他們的巨大用途．

解答 答案：D．
分析句子結(jié)構(gòu)可知，本句如果去掉it was和所填的空，將in war移到句末，仍然構(gòu)成一個(gè)完整的句子，由此可知，此處為強(qiáng)調(diào)句型，強(qiáng)調(diào)的是地點(diǎn)狀語；故選D．

點(diǎn)評(píng) 強(qiáng)調(diào)句的基本句型：It is/was+被強(qiáng)調(diào)的句子成分+that/who+句子的其他成分．
It was Doctor Smith that （who） gave us a lecture last week．上周給我們講課的正是史密斯博士．
It was last summer that my daughter learned to swim．正是去年夏天我女兒學(xué)習(xí)游泳了．

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