____ he was not rich enough to buy whatever he wanted, Edison decided to make his new laboratory the best.
A．AlthoughB．SinceC．WhenD．As
A
連詞辨析。Although雖然，盡管；Since 因?yàn)椋捎�；When當(dāng)……時(shí)候；As
雖然，盡管。句子前后表讓步關(guān)系，排除B,C；as引導(dǎo)讓步狀語(yǔ)從句，句子需要倒裝，而原句的正常語(yǔ)序，所以排除D；選A。
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