— Excuse me, is there someone in this seat?—_____. A man left his bag here and went to the washing room.I'm afraid so B. I don't think soC. I don't know D. I hope not
--What's wrong with your uncle? --- We're sure____ something is wrong with him, but we doubt_____ the disease can kill him.
---Would you mind my sitting here? ---______! The man next to me has just gone. The seat is empty now.
-- What's the skirt made of? -- It soft.. Maybe it's silk.
-- Helen, do you know if Martin to my party next week? --- I think he will come if he free.
The computer requires _____. I think I need ______ to ask Mr. Zhang for help.