问题描述：
________ that the trade between the two countries reached its highest point.
A) During the 1960’s
B) It was in the 1960’s
C) That it was in the 1960’s
D) It was the 1960’s（B）
答案A为什么不对啊
A) During the 1960’s
B) It was in the 1960’s
C) That it was in the 1960’s
D) It was the 1960’s（B）
答案A为什么不对啊
问题解答：
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