举办考试时，可以使用以下表达方式：

通知或宣布

"We are going to have an exam tomorrow."

"I have an announcement to make. We will be having a test next week."

参加考试的表达

"I need to take the exam."

"It's time for me to sit the exam."

"I will attend the exam."

动员讲话

"Tomorrow is the big day. All of us should be well-prepared and give it our best shot."

"This exam is a great opportunity to showcase your abilities and measure your progress."

"I urge all of you to take this exam seriously and do your best."

考试纪律和要求

"Please make sure to arrive at the examination hall 30 minutes before the exam starts and avoid any misconduct during the test."

"During the exam, you are not allowed to bring any other items except for necessary stationery, and you must not communicate with others or copy from others."

鼓励与期望

"I have every confidence that you will do well on the exam and achieve the results you deserve."

"Let's make this exam a stepping stone to success. Good luck, everyone!"

这些表达方式可以帮助你有效地传达考试的相关信息，激励学生，并确保考试过程的顺利进行。