有一次考试我甚至拿出一瓶沙子问考生，让他们告诉我这种沙子采集地的特征与成因。
I have occasionally taken in sand to a student exam and said, 'Tell me about this beach.'
我们下周二有一次考试，下周五还有两次。考完后，春季学期就结束了。
We will have an exam next Tuseday, and two exams next Friday, After the exams, the spring term will be over.
有一天，一位教授走进教室，告诉学生们他们马上要进行一次考试。
One day a professor entered the classroom and told the students they would have a test right away.
有一次，在那个被沃兹先生宣称为全年最难的考试结束后，沃兹先生在黑板上写下了这样一行数字：｛1｜0｜7｜3｜6｜4｜0｜0｜3。
One time, on the test proclaimed the "hardest of the year", Mr. Ward had finished grading them and wrote the grades up. We had this on the board, {1|0|7|3|6|4|0|0|3.
有一次我数学考试不及格，可我骗妈妈说我考得不错。
I failed in a math exam, but I lied to mother that I got a good mark.
你是不是有一次很难的数学考试将要来临？
如果你更加努力学习的话，下一次通过四级考试还是有可能的。
It is not impossible to pass the Band-Four examination next time if you work harder?
她认为对于已经有一次未能通过测试的小学教师而言，要学习并通过考试，最主要的问题可能是时间和资源。
She thinks the main problems facing primary school teachers who've already failed the test once might be the time and resources to study and pass.
有一次我哥哥在数学期末考试作弊时被抓住了。
在我们的生活中，可能会有一些不如意的事情，比如说，当你考试失败，或者有一次，你被好朋友误会。
In our life, there may be something unpleasant. For example, you fail in an exam, or another time you are misunderstood by your friends.
2012年2月有一次韩国语能力考试，我准备报名参加，希望能取得自己理想的资格证。
In February 2012, there is a Korean ability the exam, I'm going to sign up for, the hope can get ideal certificate.
星期二有一次大型考试。
这门课程有3项书面作业：一篇课后作文，一次课堂考试，和一份期末研究论文。
There are 3 written assignments for this course: one take-home essay, one in-class exam, and a final research paper.
祝贺您，我们有办法让您一次通过二级考试！
有一次，我考试考落到了班上十几名。
有一次，我们有一个2000米跑考试。
考试题型将和本周相同只是动词有变化。这将是一次有难度的考试，希望同学们在家中认真复习。
This will be a hard quiz so it is expected the students should be studying extra hard at home.
事实上，我第一次驾驶考试就凤有通过。
有一次我数学考试不及格，可我骗妈妈说我考得不错。
I failed in a math exam, I lied to mother that I got a good mark.
有一次我数学考试不及格，可我骗妈妈说我考得不错。
I failed in a math exam, I lied to mother that I got a good mark.
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