您要查找的是不是：
- I've just had a brainwave; I know the answer! 我刚才灵机一动，找到了答案！
- Do you know the answer to this question? 你知道这道题的答案吗？
- If you don't know the answer, leave the first question and get onto the second. 如果你答不出，那就放过第一题，做第二题。
- Stick up your hand if you know the answer. 知道答案的举手。
- If you don't know the answer, ask sb. 如你不知道答案，就问问别人。
- I fear I do not know the answer to that. 我恐怕回答不出那个问题。
- Do you know the answer to Question 10? 你知道第10题的答案吗?
- It beats me; I don't know the answer. 这可难倒了我; 我不知道答案
- Put your hand up if you know the answer. 知道答案就举手。
- If you don't know the answer, make a guess. 如果你不知道答案,可以猜一猜。
- Put up your hand if you know the answer. 知道答案就举手。
- Put up your hands if you know the answer. 如果你知道答案请举起你的手。
- If you know the answer, please put up your hand. 如果你知道答案的话,请把手举起来。
- I cannot point out but I know the answer. 我指不出,但我可以回答您的问题。
- I happen to know the answer to your question. 我碰巧知道你那道问题的答案。
- I know the answer, but I can't put my finger on it. 我知道答案,可我说不确切了。
- Come along now , someone must know the answer . 试试吧，有人一定知道答案。
- I don't know the answer so cribbed them off joan. 我不知道答案就抄了琼的。
- If you don't know the answer just improvising. 如果你不知道这个答案是什么的话,你就即兴发挥一下吧。
- We look at you, and somehow we know the answer. 我们看着你们，不知怎么，我们知道了答案。
