—I started to study， but then a friend called.—That‘s no excuse

—I started to study， but then a friend called.
—That‘s no excuse ________.
A、for not studying
B、not for studying
C、not studying
D、not to studying
【正确答案】：A
【题目解析】：excuse for doing sth 做……的借口，否定形式： excuse for not doing sth。