要表达考试难度，你可以使用以下句子：
1. The test is very difficult.
2. This exam is incredibly challenging.
3. The questions on the test are really tough.
4. The difficulty of this test is overwhelming.
5. The questions are quite perplexing.
6. The exam is extremely hard.
7. This is a very demanding test.
8. The test is like a nightmare.
9. The test is so hard that I feel helpless.
10. I can't believe how difficult this exam is.
11. The exam room was filled with anxiety and desperation.
12. The questions were so complex that I couldn't wrap my head around them.
13. I feel like I've been put through a wringer by these questions.
14. The test was a real test of my knowledge and skills.
15. Even with all my preparation, the exam was a challenge.
16. The exam was a true test of my mettle and determination.
17. The difficulty level of the exam was off the charts.
18. I'm exhausted from trying to keep up with the pace of the exam.
19. The exam was a battle, and I'm glad it's over.
20. The test was so hard that I'm considering dropping out.
以上句子可以帮助你表达考试难度，你可以根据具体情境选择合适的句子
