Rick brings a photo his pen pal.
We were sad to know that about 30 kids had been killed in Sandy Hook, Newtown, the USA ____ December 14, 2012.
—How do you know that he has bought ___ MP5?--- He wrote ____ e-mail to me yesterday.
---I’ve just heard that the lecture (讲座)to be given by Ma Yun,the Alibaba CEO,has been cancelled(取消).---Oh , no!_____________________________
Things are ________ on Mars ________ on Earth because of the different gravity.
---Be careful. You might fall into the river.---Thank you. I ________ I ________ so close to it.