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        1. I think it’s          unusual thing to find a UFO.
          A.a(chǎn)B.a(chǎn)nC.theD.不填
          B

          試題分析:句意:我認(rèn)為發(fā)現(xiàn)一個(gè)UFO是不尋常的事。這里應(yīng)該用不定冠詞表示泛指,unusual是以元音因素開(kāi)頭的單詞,所以應(yīng)該用an,故選B。
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