If you are absent-minded while reading, you are more_________ to make mistakes.

I think you should go back to your          plan, which is much more practical than the present one. 

 ---Do you know what Tom does all day? ---I know he spends at least _______ time watching TV as he does spend doing his lessons.

If you sleep less than seven hours, you are three times more       to catch a cold．

After the new machine was introduced, the factory produced _____ in 2011 as the year before.