单选题
The reason was that it was not at that time
ascertained
that those materials were definitely to be used.
A. determined B. argued C. pretended D. hypothesized
A
B
C
D
【正确答案】
A
【答案解析】
[解析] 划线词ascerained“确定”。A项determined“决定”；B项argued“争论”；C项pretended“假装”；D项hypothesized“假设，猜测”。所以，A项与划线词语意最为接近。
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