It was in when he was already in that he went to Yan'an.A.the 1940s; the 40sB.th
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It was in ________ when he was already in ________ that he went to Yan'an.
A.the 1940s; the 40s
B.the 1940s; his forties
C.1940's; his forties
D.the 1940's; his 40s
试题答案
B