A. as B. if C. till D. though
解答：选（A）根据题意，本题需要一个引导原因状语从句的连词，只有as有此用法。而if表示条件或假设；till引导时间；though表示让步或转折。
35. I have found some articles ______ the harmful effects of drinking.
A. being concerned B. concerned C. to concern D. concerning
解答：选（D）concerning是由动词转换而来的介词，意为“关于”
36. So loudly ______that people could hear it out in the street.
A. did the students play the music B. the students playing the music
C. the student played the music D. have the students played the music
解答：选（A）本题考查关联词置于句首，句子需要倒装。可放在句首的关联词有so…that，such…that，not only…but also，neither…nor…，hardly / scarcely / barely…， when，另外含有否定意义的词置于句首，句子也需要倒装，如：barely，few，hardly，little，rarely，scarcely，seldom，nowhere，never，no longer，no more， no sooner…than，not until，not in the least，not for a minute。本题中so置于句首，因此句子倒装。
37. At the international conference, the famous scientist gave an excellent report _______ on his recent experiment.
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