444. Do you have any idea? 你怎么想？　

443. He was absent yesterday. Do you know why? 昨天他没到，你知道为什么吗？　

442. That's excellent. 那太棒了。　

441. That's ok/fine. 挺好的。　

440. Is that ok? 这样行吗？　

439. I think you're mistaken about that. 我想你那样不对。　

438. Absolutely right. 绝对正确。　

437. Is that right? 那样对吗？　

436. What do you think about it? 你对此怎么看？　

435. We go to bed at 10:30. 我们十点半睡觉。