Billy: I’ve been fixing the computer for over three hours, but it still doesn’t work. Nana: Why don’t you take a rest and try ? Maybe you’ll do better then.

______ of that country is covered by snow.

As is reported, it won’t take a long time ____ the Hefei.

Do you often watch Man and Nature on TV?— Sometimes. It’s an interesting program, but I __________Sports News.

_____is it? — It’s twelve. [ ]