How often do you use your car? Can you use your car less often? Do you know the following facts in the UK? ?? About 50% of all car journeys are just for fun. ?? Over 80% people go to work by car. ?? 2
I “ain’t” doing that “cos” I don’t want to! Do you understand this sentence? We speak slang words(俚语) sometimes, but it’s important to learn formal words to improve our study. This
，a1＝1，则a6＝( )
B.
C．11 D.
