My mother and olga had met while underwent fertility treatments at some
单选题My mother and olga had met while underwent fertility treatments at some sort of experimental program in one of the Moscow clinics.
A.while undergoing
B.when were undergoing
C.during the time they underwent
D.while they underwent
参考答案：A
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涉及考点
2020翻译二级笔译综合能力考试大纲
一、词汇和语法
