We have been told that under no circumstances_____the telephone in the office for personal affairs.

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问题 We have been told that under no circumstances_____the telephone in the office for personal affairs.

选项 A、may we use
B、we may use
C、we could use
D、did we use

答案A

解析 under no circumstances为否定表达,当位于句首时,句子使用部分倒装;再则,主句为现在完成时,从句使用相应的现在时。
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