78 percent of black high-school graduates are unemployed.
百分之四十八的黑人高中毕业生失业。
I don't think your plan will work.
我想你的计划行不通。
I'm not sure. I ought to do some studying, as I've got masses of work to do, but I think I'll be too tired. Maybe I'll just watch the news on television and go to bed early.