【题目】—Haven't seen you for ages! Where have you been?
—I went to Ningxia and there for one year, teaching as a volunteer.
A.stayed
B.stay
C.had stayed
D.am staying

【答案】A
【解析】句意：——好久没见到你了！你去哪里了？——我去了宁夏，并且在那里待了一年，作为一名志愿者在那里教书。and连接并列谓语。and之前是一般过去时。所以and之后也要用一般过去时来保持时态的一致，故用动词的过去式，所以选A。