一、 单项选择 从下列每题所给的选项中，选择一个最佳答案。(15分)
( ) 1. This is _____ second year that China has taken part in the activity Earth Hour.
But we hope we can try our best to make the earth ____better world.
A.the; a B.a; the C.the, / D.the, the
( ) 2. It’s really brave ______ Chai Jing to tell so much truth to the public.
A.for B.of C.to D.in
( ) 3. ---Would you mind giving me some more bread? I’m still a little bit hungry.
---______. Help yourself.
A.Yes, I would B.Better not C.Not at all D.You are welcome
( ) 4. ---______ do you brush your teeth every day?
---Three times. At least twice suggested by doctors.
A.How soon B.How long C.How often D.How many times
( ) 5. Two thirds of the information on the internet ______ not officially published(发布) now. You must learn to protect yourse lves.
A.is B.are C.was D.were
