—What did Mr Smith do before he came to China?—He________in a car factory.
—Does Bob have vegetables for dinner? —______. But his sister has some carrots.
—Excuse ______. Is this ______ book?—Yes, thanks.
—Is that ______ volleyball?—Yes. Bill likes playing ______ volleyball. ______ volleyball is his.
---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.