Give some suggestions... When you're in a bad mood, what will you do to make yourself happy?

I'm sad One of my roommates is going to studying in the US. I'm very happy for her but I'm also very sad. Because we often together when we are at school. A total of four people in our dormitory. Two of them are local people, and they usually go home on weekends. So I will be lonely when my roommate went to the US.

How are you doing How are you doing 和 How are you 有什么区别？

句首什么时候用动词原形，什么时候用V+ing ? 句首什么时候用V ，什么时候用V+ing 形式呢？For example: Hope you have a good night. 还是Hoping you have a good night. And why?

时差用英语怎么说？ ①jet lag. ②equation of time. ③time difference . 三个都有时差的意思吗？一般是用哪个呢？

China's Tomb Sweeping Day (About Chinese culture) The day after tomorrow is the The Sweeping Day in China. The Sweeping Day is one of the traditional festivals in China. It is usually in April 5th of each year. But sometimes it will be in April 4th or 6th ,and this year is in April 4th. It has a history more then 2500 years. Now, this day is a statutory public holiday in China. Chinese people will commemorate the ancestors and relatives of the deceased in this day . If I have any mistakes in this article, please point it out. Thanks a lot.