2. 外语
  3. Doing morning exercises has helped to improve her health, ______?

Doing morning exercises has helped to improve her health, ______?

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问题 Doing morning exercises has helped to improve her health, ______?
选项 A、isn’t it
B、hasn’t it
C、hasn’t they
D、hasn’t she
答案B
解析 当不定式短语、动名词短语、或其他短语作陈述句部分的主语时，附加疑问句的主语通常用it。本句陈述句部分动词为has，故附加疑问句为hasn’t it。故B正确。
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