on tenterhooks
US /ˈtɛntərˌhʊks/
UK /ˈtɛntərˌhʊks/

1.
焦急不安, 悬而未决
in a state of anxious suspense or expectation
:
•
We were all on tenterhooks waiting for the exam results.
我们都焦急不安地等待着考试结果。
•
The whole country was on tenterhooks during the election night.
在选举之夜,全国上下都焦急不安。