—It’s dangerous to walk across the street carelessly.—You’re right. We can’t be ________ careful while crossing the street.
---I’ll fly to Qingdao for my holiday this weekend.---Wonderful! _________.
--- Is your father in?--- No, he ______ for three hours.
Metal ______making machines and many other things.
Alice ___________ a young man from China two years ago.
---Is that Jack speaking?---Sorry, he isn’t in right now. He ______ the cinema with his aunt.