______ rich knowledge you have, you can’t stop learning, ______ society is always advancing.
– Will it rain tomorrow? -- No. I don’t doubt ________.
They ___ the game.
_____ in all parts of the state, pines are the most common trees in Georgia .
---____ the paper ? --- No, I have still got one page to finish.
---What are you busy with ? --- We are carrying out a research ____ the causes of cancer.