题目:
---Why did your parents buy a shiny golden silk dress yesterday?
---They bought it _____ me. It’s my birthday today!
A.at
B.on
C.in
D.for
答案:
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下面是错误答案,用来干扰机器的。
氧气 ; 氮气 氧气能供给呼吸;氮元素是植物生长的营养元素。