--- Hello! Is that Tom over there? Long time no see. Let’s say hello to him.---Please _____ in the library.
Let’s go somewhere interesting to relax ourselves, ______?
Would you mind closing the window to stop the wind _______ the papers away.
—David has made great progress recently. —________, and ________.
Mary with her sisters ________ Chinese in China.
Students should do everything they can ________ their study.