Even though she looks very young she is______my twenty－year－old sister.A．twice older than
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Even though she looks very young, she is______my twenty-year-old sister.
A．twice older than
B．twice as old as
C．twice as older as
D．twice old than
请帮忙给出正确答案和分析，谢谢！
更新中~-
正确答案：B
本题考查形容词的比较级中倍数的表达法，正确的表达法是在第一个as前面加上表示倍数的词，即：倍数+as+动词原形+as，所以B正确。题意为，即使她看上去很年轻，她已经是我20岁妹妹年龄的两倍那么大年纪。