—What about going to the zoo by bus?— . It’s good for the air.A Little B. It doesn’t matterC. That’s bad D. Good idea
—David has made great progress recently. —________, and ________.
Mary with her sisters ________ Chinese in China.
Students should do everything they can ________ their study.
—I don’t know if Dr. White _______ to the party next week? —I think he will come if he ________ free.
Shanghai is _______ one of the two cities.