—Do your parents allow you to go to the movies on weekends? —Yes. I ________ to go to the movies on weekends. A. am not allowed B. allow C. allowed D. am allowed
How to Be a WinnerSir Steven RedgraveWinner of 5 Olympic Gold Medals“In 1997 I was found to have developed diabetes(糖尿病). Believing my career（职业生涯） was over, I felt extremely low.
(2x-3x2)+
(2x-3x2)2+
(2x-3x2)3+
(2x-3x2)4+
(2x-3x2)5+
(2x-3x2)6.
(2x-3x2)6含有x12的项，其项为（-3x2）6=36x12=729x12,即(1+2x-3x2)6的展开式中含有x12的项的系数为729.