Even though she looks very young, she is______my twenty-year-old sister.

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问题 Even though she looks very young, she is______my twenty-year-old sister.

选项 A、twice older than
B、twice as old as
C、twice as older as
D、twice old than

答案B

解析 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。
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