A:because; because
B:because; because of
C:because of; because
D:because of; because of
任何组织或者个人不得披露未成年人的____。
用反证法证明“a<b”时第一步应假设( )
-- Do you have any plans for this Sunday?
-- I'm not sure. I ______ go to the countryside to see my grandmother.