When you worry you tend not to be able to fall asleep and when you can’t fall as

游客2023-10-27 36

问题 When you worry you tend not to be able to fall asleep and when you can’t fall asleep you worry even more. It’s a ______ circle.

选项 A、repetitive
B、bad
C、round
D、vicious

答案 D

解析 vicious circle是习惯用语，表“恶性循环”。

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