I think walking is _____ our health. [ ]
A. good at
B. bad at
C. well in
D. good for
答案:D
Some famous singers live on the ___ from their record sales.
A.salary
B.value
C.bill
D.income
境内机构的经常项目外汇收入,应当卖给经营结汇、售汇业务的金融机构。( )