Why do you like watching the news—Because I hope to _______ what’s going on around the world.

31. It’s not easy for experts to ______ H1N1 flu in humans from regular human seasonal influenza.

I am afraid I would have little influence over her________her mind was made up on any subject[ ]

The sweet smell of the flowers in the garden comes in _______ the open window, making us feel in good mood(心情).

Both of the skirts are in style this year. —Yes, but I think the green one is.