She gave a surprise test for us.

她给了我们一次突击测试。

youdao

She gave a surprise test.

她给了我们一次突击测试。

youdao

She was late to school, and to top it all off she missed a surprise test.

上学又迟到了，最糟的是她还错过了一场事先不通知的考试。

youdao

While at the same time as I say congratulations, I want to remind you that I think it comes as no surprise given the lateness of Labor Day this year that this first test came rather early and for many of you much of this material you had seen in high school.

当我对你们表示祝贺的同时，我也想提醒你，今年晚来的劳动节,并非是什么惊喜,第一个测试来的比较早,你们中的绝大多数在高中已经见过了。

麻省理工公开课 - 固态化学导论课程节选

On July 30, antidoping authorities administered a surprise test, Mr. Schwazer said, and the test yielded a positive result.

WSJ: Menu

Later everyone got a surprise memory test: For each event, can you remember who did it?

WSJ: Does Language Influence Culture?

Three weeks after the scan, the volunteers were given a surprise memory test.

BBC: Sexes handle emotions differently