18．-Let's try to get two seats near the stage．
-Listen，we will be lucky enough ______ we can get any tickets．（　�。�
A．tillB．ifC．sinceD．though

分析 -讓我們?cè)O(shè)法弄到兩個(gè)靠近舞臺(tái)的座位．
-聽(tīng)，如果我們能得到一些票的話(huà)，我們將會(huì)足夠的幸運(yùn)了．

解答 答案：B
A． till 引導(dǎo)時(shí)間狀語(yǔ)從句：直到…時(shí)（為止）；在…之前；   B． if 導(dǎo)條件狀語(yǔ)從句：如果； C． since 引導(dǎo)時(shí)間以及原因狀語(yǔ)從句：自從…以來(lái)；既然；由于；  D． though引導(dǎo)讓步狀語(yǔ)從句：雖然，盡管； 即使； 分析句意可知，答語(yǔ)中的前后兩句應(yīng)是互為條件關(guān)系，即：如果我們能得到一些票的話(huà)，我們將會(huì)足夠的幸運(yùn)了；故選B

點(diǎn)評(píng) 本題考查從屬連詞的if用法．做本題時(shí)，首先應(yīng)熟練掌握各從屬連詞的用法及區(qū)別；其次應(yīng)正確判斷出主從句之間的句意關(guān)系，然后選出相應(yīng)的連詞．

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