2. 外语
  3. —If a = 4, b = 5, what’ s the answer to the question " a + 2ab +1 =?" —______.

—If a = 4, b = 5, what’ s the answer to the question " a + 2ab +1 =?" —______.

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问题 —If a = 4, b = 5, what’ s the answer to the question " a + 2ab +1 =?" —______.
选项 A、Forty-fifth
B、Forty-five
C、Twenty-three
D、One hundred and twenty-one
答案B
解析 本题考查对基数词和序数词的辨析。根据题意，如果a=4，b=5，那么a+2ab+1等于45。forty-fifth表示第45，forty-five表示45。因此选B。
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