18.Seldom ____ him recently, for you see I’m preparing for the project.
Would you please _______ fill the same bottle _______ full?
Don't rush. There's still ______ time left.
-----Do you know if the old man is still living? ----- I'm sorry. He _________. He ______ for two months.
Silk ________ in _______ China.
_______ it goes on, hour ________ hour.