18.
All members had to swear a solemn ______ never to reveal the secrets of the organization.
A、
oath
B、
testimony
C、
guarantee
D、
statement
【正确答案】
A
【答案解析】
swear an oath发誓(固定搭配)，oath誓言/宣誓，testimony(尤指法庭作的)证词/宣言，guarantee保证/担保，statement生命/陈述
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