--We need a new leader for our Helping Hands Club, but I don't know ______
--What about Mary? She is always willing to help others.
A. when to choose B. how to choose C. what to choose D. who to choose
【答案】D
【解析】句意:我们的助手俱乐部需要一个新领导,但我不知道该选谁。----玛丽呢?她总是愿意帮助别人。A. when to choose什么时候选;B. how to choose怎样选;C. what to choose选什么;D. who to choose选谁。根据下文“玛丽呢?她总是愿意帮助别人。”可知此句是“但我不知道该选谁。”故选D。